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01 June 1994, Volume 15 Issue 2 Previous Issue    Next Issue

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A PRELIMINARY DISCUSSION OF THEORETICAL MODEL “GEOTHERMICS·BASIN·HYDROCARBON” AND ITS APPLICATION IN PETROLEUM GEOLOGY Liu Guobi, Feng Fukai 1994, 15 (2):  95-101.  Abstract ( 64 )   PDF (543KB) ( 430 )   Save Theoretical model “Geothermics·Basin·Hydrocarbon" is a scientific result obtained by a group of researchers led by Mr. Feng Fukai at Petroleum Geology Institute of Ministry of Geology and Mineral Resources(MGMR). Its main points can be described as follows: Geodynamics is based on thermodynamic. Thermal activity in the deeper part of the earth is the major macroscopic control on tectonic movement of crust as well as formation, distribution and evolution of a sedimentary basin. Thermal characteristics of various basins control organic matters alternation and hydro-carbon phase behavior distribution within them. In the process of conversion of kerogen to hydrocarbon, thermal effect the most active among masses of geologic and physio-chemical factors, which is the prerequisite condition for formation of basin and also a link between basin and hydrocarbon. Related Articles | Metrics

ON TECTONIC FEATURES OF MIDDLE PART OF ALTUN TECTONIC BELT Yao Junxiang 1994, 15 (2):  102-109.  Abstract ( 112 )   PDF (687KB) ( 277 )   Save Altun tectonic belt lies between Mounts Tianshan and Kunlun, with about 200 km in width and extension of over 1500 km, which is a faulting and uplifting tectonic belt with EW-trending tectonic setting control in tectonic frame work of basement as NE-trending leading tectonics controlling regional tectonic framework. NE and EW tectonics, along with their conjunction and compounding, form the major tectonic forms of Altun tectonic belt. Three types of basins with certain degrees of prospectives (tensional, shear and compressional) are present within Altun tectonic belt and adjacent regions, amongst which the shear basin is the most promising target for oil. References | Related Articles | Metrics

PETROLEUM GEOLOGIC CHARACTERISTICS AND SUGGESTIONS FOR FURTHER PROSPECTING IN SANTANGHU BASIN Li Xibin 1994, 15 (2):  110-115.  Abstract ( 135 )   PDF (524KB) ( 318 )   Save This paper describes stratigraphy, division of structural units, combinations of source rock, reservoir rock and caprock, and oil source analysis in Santanghu basin. Finally, prospecting experiences are summerized and suggestions for further prospecting presented. References | Related Articles | Metrics

SEDIMENTOLOGY STUDY OF JURASSIC RESERVOIR IN TAIBEI SAG OF TURPAN-HAM BASIN Wu Yinye, Xue Shuhao, Ying Fengxiang, Guo Hongli, Li Huaming, Tang Xianghua 1994, 15 (2):  116-125.  Abstract ( 83 )   PDF (799KB) ( 160 )   Save Study of the Jurassic in Taibei sag of Turpan-Hami basin was conducted with seqene stratigraphic analysis. Theod according to the characteristics of depositional evolution, resulting in the division into three types of sequence stratigraphy models (Takequan uplift, south low-angle slope and northeast high-angle shooe) and uree types of corres-winding models for formation of Reservoirs. The characteristics of diagenic evolution of the Jurassic in Tabei sag was discussed upon the diagenics process and early diagenic phase of mechanical compction and partial cementation, late (A1) diegenic phase of dissolution and late (A2 and B) diagenic phases of recementation were vertically divided. It is concluded that secondary porosity and fractures resulting from dissolution, tectonic movement and compaction proved reservoir quality the western and central parts of Taibei sag should be the key area for petroleum explaration and secondary porosity dominated zones at moderate to deep burials can be considered as the target for diagenic reservior trap exploration. References | Related Articles | Metrics

PROVENANCE ANALYSIS ON SEDIMENT FILLED SEQUENCES IN NORTHE ASTERN TARIM BASIN Cao Shoulian, Chen Fajing 1994, 15 (2):  126-132.  Abstract ( 74 )   PDF (579KB) ( 213 )   Save The filled sequence of Silurian-Devonian and Mesozoic-Cenozoic in northeastern Tarim basin are composed of siliceous clastic rocks. Following statistical analysis of minerals in sandstone with point counting method cobined with stud of reginal tectonic setting it is considered that source area of Kuqa depression is South Tianshan oxygen and the filled sequence at depocenter of subsidence recorded the unroofed history of it. During Silurian-Devonian periods, the clastic rocks in Northeastern Tarim depression were sourced from old Northern Tarim uplift to the north Ordovician during the midiriod of Caledonian orogeny and Kuluktag uplift at the northeastern corner whereas. during Triassic-jurassic periods, Shaya uplift and Kuluktag uplift formed during the Hercynian orogeny arethe main source area. Sediments from South Tianshan orogen were deposited in the depression since Cretaceous. The type of source area varied as the depression evolved, and even sediments in the same source area could resulted in diferent mineral compositions in sandstone owing to the different transportation distances. References | Related Articles | Metrics

ESTABLISHMENT OF MIDDLE CARBONIFEROUS PROTRITICITES ZONE ON DUWA SECTION IN TARIM BASIN AND ITS GEOLOGIC SIGNIFICANCE Shen Yixin 1994, 15 (2):  133-135.  Abstract ( 78 )   PDF (192KB) ( 153 )   Save Protriticites zone at the top of Middle Carbonaferous was established following systematic analysis of Fusulinids fossil on Duwa section in the southwestern part of Tarim basin which provided new data for formation subdivision and correlation in this area. References | Related Articles | Metrics

DISC USSION ON COAL-FORMED HYDRCCARBONS IN JUNGGAR BASIN CORRELATED WITH THEIR CONDITIONS IN AUSTRALIA Wang Yutao 1994, 15 (2):  136-141.  Abstract ( 86 )   PDF (623KB) ( 252 )   Save Hydrocarbon-generated potentials of Middle-lower Jurassic coal measures in Junggar basin were discussed on the basic of geologic and geochemical analyses of conditions for coal-formed hydrocarbons in Gips and basin, Australia,and sources correlations were made among the discovered Jurassic oilfields. It is concluded that Middte-lower Jurassiccoaly successions were considered to be unfavorable for hydrocarbon generatio n terms of both the characteristics of geologic evolution macroscopically and compositions of kerogen macerals microscopically, and hydrocarbons from Jurassic oilfields in Jungar basin primarily related to Lower Jurassic humic-prone to humic Dispersed org nicatters (relam stone). References | Related Articles | Metrics

CHARACTERISTICS OF NORMAL AND ISOMERIC ALKANE EVOLUTION DURING HYDRO-PYROLYSIS EXPERIMENT Chen Chuanping, Mei Bowen, Jia Fajing 1994, 15 (2):  142-146.  Abstract ( 89 )   PDF (443KB) ( 225 )   Save Hydro-pyioiysis experiment was made with low mature source rock (Triassic) in Luranan area of Tarim basin. Results showed that greater changes occurred for its distribution parameters ot saturated hydrocarbon ollipared with that of originai source rock. The percentage of isoalkane increased in pyroiysed sampies, distribution range of carbonriumber of norrnai aikane moved forward for samples added with montmorilonite. Conspicuously, Prisane predominace in extracts of source rock was changed into that of phytane following pyrolysis. References | Related Articles | Metrics

RESULTS OF APPLICATION OF AVO TECHNIQUE IN THEREA OF WELL K75 IN KARAMAY Lai Zhongkang, Guo Fuxian 1994, 15 (2):  147-151.  Abstract ( 114 )   PDF (477KB) ( 156 )   Save Petroliferous area in the Area of Well K75 in Karamay oilfield was first predicted with AVO technique in Xinjiang, which was accomplished as follows: Forward trace assemblage model is established from S-wave and P-wave data in oil well, ten the top and bottom of reservoir on the actual profile are followed with AVO technique to examine if both responses match well, hereafter tracing along the sections according to this characteristics to determine oil water boundary and predict other potential oil-bearing zones with AVO anomaly. Confirmed with drilling and testing data, this technique is successful for use in this area. Related Articles | Metrics

ADVANCE IN LOGGING TECHNIQUE IN XINJHANG AND ITS APPLICATION RESULT Zhao Yan 1994, 15 (2):  152-157.  Abstract ( 130 )   PDF (678KB) ( 129 )   Save Advanced logging techniques at home and abroad have been in close sight of Xinjiang Petroleum Administration Bureau in 1992—1993. In dealing with field data acquisition and digital processing, the principle “Introduction·Digestion·Absorption” is followed. In accordance with complex lithologies and varieties of reservoir in Xinjiang, the logging suite and digital processing softwares are constantly renewed which played a critical role in single well evaluation and reservoir deacription, applications of Schlumberger CSU-D and MAXIS-500 logging tools in exploration logging and reservoir description showed good results. Related Articles | Metrics

NUMERICAL SIMULATION OF FAULT STRESS AND FRACTURE DISTRIBUTION WITHIN LOWER PERMIAN LOCAL STRUCTURES IN SOUTHERN SICHUAN Hu Zhishui, Peng Dajun, Dai Danshen 1994, 15 (2):  158-162.  Abstract ( 63 )   PDF (452KB) ( 186 )   Save This paper describes the process in which fault stress and its relation to tectonic fractures were analysed with fnite element method by establishment of mechanical model of Lower Permian carbonate based on the geologic characteristic of Lower Permian dens carbonate reservoir in othen Sichuan and theory of elastic mechanics, and case studies were made by taking some local structures, such as Yonganchang, as examples. Results were then compared to drilling data, which provide a new iea for quantitative study of fracture growth patterns in dense carbonate rock and prediction of gas reservoirs. References | Related Articles | Metrics

A METHOD OF ESTAMATING BREAKTHROUGH PRESSURE AND DISPLACEMENT PRESSURE OF CAPROCK Huang Zhilong, Hao Shisheng 1994, 15 (2):  163-166.  Abstract ( 240 )   PDF (292KB) ( 247 )   Save It is considered improper that breakthrough pressure is used to evaluate caprock quality. Therefore, true displacement pressure of caprock is obtained with correction of breakthrough pressure with respect to tim and temperatere. Finally, a method of estimating displacement pressure of caprock is presented. References | Related Articles | Metrics

GEOLOGICAL ANALYSIS OF IMPROVING PERCOLATION CONDITIONS BY ACIDIZINGAN EXAMPLE FROM BAIKOUQUAN OILFIELD Yang Xuewen, Yu Wen, Wang Chengjun, Zhao Lingli, Qian Zhihua, Wang Guohui 1994, 15 (2):  167-174.  Abstract ( 108 )   PDF (625KB) ( 221 )   Save Devastation of percolation condiuon in oil-searing zones resulting from scaling in bottom hole and near-well bore formation as well as fine migration accumnuiatior and swelling within reservoir is the major averse control onificant decline in fluid production of Baikuquan oilfield. Experiments show that percolation condition of oil-bearing zolies can be improved using acidizing technique and then fluid production can increase oy a wide margin. Such operations as water detection and blocking should precede acidizing treatment. The cases study showed that the optimum can be obtained with micellar acid acidizing. Related Articles | Metrics

SATURATION PRESSURE DERIVED FROM TRANSIENT TEST DATA——AN EXAMPLE FROM EAST JUNGGAR OIL AREA Wang Guoxian, Du Junshe, Li Bin 1994, 15 (2):  175-178.  Abstract ( 105 )   PDF (299KB) ( 260 )   Save Saturation pressures were derived for various types of reservoir with low saturation reservoir pressure differences, using the pressure buildup curves, which not only makes up for such pitfalls as limited samples far PVT analysis and strict sampling condition, but also extends the application range of pressure buildup curve. This method is successful for use in Huoshaoshan and Beisantai oilfield in East Junggar oil area. References | Related Articles | Metrics

UNDERSTANDING OF VISCOUS OIL RESERVOIR OF LOW RESISTIVITY IN FENGCHENG AREA OF KARAMAY OILFIELD Guo Hongbo 1994, 15 (2):  179-183.  Abstract ( 70 )   PDF (512KB) ( 188 )   Save A Comprehensive study of geologic characteristics of low-resistivity viscous oil reservoir in Well Zhongjian 3 in Fengcheng area showed that low-resistivity viscous oil formation is mostly composed of sandstone with high clay content, and mudstone interbedded with sandstone with low clay content, in which sandstone with low clay content is oil bearing/production formation. Due to increase in irreducible water saturation resulting from high clay content in full earing/production formation Due to increase in irreducible water saturation resulting from high clay content in full scale viscous oil interval predominated by montmorillonite clay mineral as well as its higher salinity, low-resistivity presentation occur in well. In order that well log interpretations match weli. Saturation standards of moderate-and high-resistivity oil-bearing zones can't be only followed, the geologic charaeteristics and well log information must be analysed simultaneously. References | Related Articles | Metrics

APPIICATION OF IOG DATA BASE IN RESERVOIR DESCRIPTION Zeng Yiming 1994, 15 (2):  184-187.  Abstract ( 66 )   PDF (410KB) ( 208 )   Save References | Related Articles | Metrics