The Deep Abnormal Pressure and the Formation of Lithologic Reservoir in Dongying Sag

Abstract

Abstract: The relationship between the deep overpressure and the lithologic hydrocarbon accumulation in Dongying sag is presented. The study shows that the oil-gas containing degree in the deep sand body is positive correlation to the overpressure which could be the main dynamic force for lithologic trapping and filling, lowering the cutoff value of PVT in such a reservoir. Therefore, the petrophysical conditions could not be as the main factors to constrain hydrocarbon accumulation in the overpressure belt rather than the fractures formed by overpressure. With the overpressure fractures' intermittent opening and close, oil-gas fluid could fill intermittently into the lithologic trap in the form of mix phase, while the water within the trap could flow out continuously and slowly. It is concluded that the existence of strong dynamic force allows the deep lithologic reservoir in Dongying sag to be of bright exploration potentials.

Key words: Dongying sag, abnormal pressure, overpressure, lithologic reservoir, dynamic force, oil saturation

CLC Number:

TE112

BAO You-shu, ZHANG Lin-ye, ZHANG Shou-chun, LIU Qing, ZHANG Lei. The Deep Abnormal Pressure and the Formation of Lithologic Reservoir in Dongying Sag[J]. Xinjiang Petroleum Geology, 2008, 29(5): 585-587.

References

[1] 隋风贵. 东营断陷盆地地层流体超压系统与油气运聚成藏[J]. 石油大学学报(自然科学版)，2004，2 8(3)：17-21.
[2] 邱桂强，凌云，樊洪海. 东营凹陷古近系烃源岩超压特征及分布规律[J]. 石油勘探与开发，2003，30(3)：71-75.
[3] 郑和荣，黄永玲，冯有良. 东营凹陷下第三系地层异常高压体系及其石油地质意义[J]. 石油勘探与开发，2000，2 7 (4)：67-70.
[4] 张林晔，刘庆，张春荣. 东营凹陷成烃与成藏关系研究 [M]. 北京：地质出版社，2005.
[5] 刘庆，张林晔，沈忠民，等.东营凹陷富有机质烃源岩顺层微裂隙的发育与油气运移[J]. 地质论评，2004，50(6)： 593-597.
[6] Littke R，Baker D R，Leythaeuser D. Microscope and sedimentologic evidence for the generation and migration of hydrocarbons in Toarcian sourcerocks of different maturities [J]. Org. Geochem., 1988，1 3(1～3)：549-559.
[7] Vernik L，Charles L.Elastic anisotropy of sourcerocks：implication for hydrocarbon generation and primary migration[J]. AAPG Bulletin，1996，80(4)：531-544.
[8] 戴俊生，汪必峰，马占荣. 脆性低渗透砂岩破裂准则研究 [J]. 新疆石油地质，2007，2 8(4)：393-395.
[9] 王平. 含油盆地构造力学原理[M]. 北京：石油工业出版社，1993.
[10] 刘向君，罗平亚. 岩石力学与石油工程[M]. 北京：石油工业出版社，2004.
[11] 张小莉，冯乔，李文厚. 压实盆地自然水力压裂及其动力学[J]. 石油与天然气地质[J]. 1998，1 9(2)：116-123.
[12] Mórquez X M，Mountjoy E W. Microfractures due to overpressures caused by thermal cracking in well sealed upper Devonian reservoirs , Deep Alberta basin[J]. AAPG Bulletin, 1996, 80(4)：571-587.
[13] Hunt J M. The generation and migration of petroleum from abnormally pressured fluid compartments[J]. AAPG Bulletin，1990，74(1)：1-12.

[1]	LU Xuesong, ZHANG Fengqi, ZHAO Mengjun, ZHUO Qingong, GUI Lili, YU Zhichao, LIU Qiang. Genesis of Overpressure and Sealing Ability of Caprocks in Well Gaotan 1 in the Southern Margin of Junggar Basin [J]. Xinjiang Petroleum Geology, 2021, 42(6): 666-675.
[2]	MIN Wei. Sedimentary Characteristics of Glutenites of Sha 3 Member in Block Tuo 826, Dongying Sag [J]. Xinjiang Petroleum Geology, 2021, 42(4): 428-436.
[3]	ZHANG Hua, KANG Jilun, WANG Xinggang, LI Hongwei, JIA Xueli, ZHOU Yadong. Characteristics and Genesis of Low Oil-Saturation Reservoirs in Taibei Sag, Tuha Basin [J]. Xinjiang Petroleum Geology, 2020, 41(zk(English)): 84-91.
[4]	ZHANG Hua, KANG Jilun, WANG Xinggang, LI Hongwei, JIA Xueli, ZHOU Yadong. Characteristics and Genesis of Low Oil-Saturation Reservoirs in Taibei Sag, Tuha Basin [J]. Xinjiang Petroleum Geology, 2020, 41(6): 685-691.
[5]	PAN Haifeng, SHU Kun, ZHAO Ronggang, WANG Jie, HOU Chengcheng. Rolling Evaluation on Small Lithologic Reservoirs in Slope Zones: A Case Study on Putaogou-Pubei Structural Zone of Taibei Sag in Turpan-Hami Basin [J]. Xinjiang Petroleum Geology, 2020, 41(6): 692-696.
[6]	Zhu Deshun. Influencing Factor Analysis and Comprehensive Evaluation Method of Lacustrine Shale Oil: Cases from Dongying and Zhanhua Sags [J]. , 2019, 40(3): 1-1.
[7]	ZHAO Yue, CAI Jingong, LEI Tianzhu, YANG Yan. Quantitative Characterization of Organic Matters with Different Occurrences in Argillaceous Source Rocks: A Case of Shahejie Formation, Dongying Sag [J]. Xinjiang Petroleum Geology, 2018, 39(zk(English) ): 74-81.
[8]	ZHAO Yue1,2, CAI Jingong2, LEI Tianzhu3, YANG Yan3,4. Quantitative Characterization of Organic Matters with Different Occurrences in Argillaceous Source Rocks: A Case of Shahejie Formation, Dongying Sag [J]. , 2018, 39(4): 1-1.
[9]	REN Peng1, WANG Weifeng1, CHEN Gangqiang2. Characteristics and Genesis of Low Oil-Saturation Reservoir in the First Member of Hutubihe Formation in Wellblock Lu-9, Luliang Oilfield [J]. , 2018, 39(3): 1-1.
[10]	ZHI Dongming1a, TANG Yong1b, ZHENG Menglin1b, GUO Wenjian1b, WU Tao1b ZOU Zhiwen2. Discovery, Distribution and Exploration Practice of Large Oil Provinces of Above?Source Conglomerate in Mahu Sag [J]. , 2018, 39(1): 1-1.
[11]	GAO Yang. Lower Limits of Physical Properties of Glutenite Reservoir in Lower Section of the 4^th Member of Shahejie Formation in Steep Slope Zone of Northern Dongying Sag [J]. Xinjiang Petroleum Geology, 2017, 38(zk(English) ): 36-44.
[12]	GAO Yang. Lower Limits of Physical Properties of Glutenite Reservoir in Lower Section of the 4th Member of Shahejie Formation in Steep Slope Zone of Northern Dongying Sag [J]. , 2017, 38(5): 1-1.
[13]	WU Guohai. Discovery of Lacustrine Condensed Layers and Prediction of Lithological Reservoirs: A Case Study of S Oilfield in the South Turgay Basin of Kazakhstan [J]. , 2017, 38(4): 1-1.
[14]	LI Qian1, LU Shuangfang1a, LI Wenhao1a, XU Siyong2, ZHANG Han1, HU Ying1. Hydrocarbon Accumulation Differences of Tight Oil between Williston Basin and Western Gulf of Mexico Basin [J]. , 2016, 37(6): 1-1.
[15]	XUE JiankangWANG YudouWANG DianshengZHOU WeiWANG Xueying. Impact of Sand Grains on Reservoir Permeability Based on Digital Cores [J]. , 2016, 37(4): 1-1.