Productivity Prediction and Influencing Factors of Low Permeability Reservoirs After Steering Fracturing Stimulation

doi:10.7657/XJPG20210110

Abstract

Abstract:

Steering fracturing can expand the drainage area of low permeability reservoirs and achieve the effect of volume fracturing. However, the fractures induced by steering fracturing are complicated, and should be finely characterized to accurately predict the post-fracturing productivity. Based on the production data from Karamay oilfield, and in view of the characteristics of steering fractures, a mathematical model of single-phase flow was established, and a grid refinement technology was used to densify the steering fractures. Field application has proved that the oil production after steering fracturing was 5.3 times higher than that of conventional fracturing. The factors influencing the productivity after steering fracturing were evaluated and the result shows that the production is positively correlated with reservoir permeability, steering fracture length and conductivity of initial induced fractures, but not necessarily depending on steering fractures to get a high flow conductivity.

Key words: low permeability oilfield, steering fracturing, local grid densification, grid refinement, mathematical model, productivity prediction, influencing factor

CLC Number:

TE357.14

PU Xiao, GUO Dali, LAN Tian, HE Yong, ZHAO Yunxiang. Productivity Prediction and Influencing Factors of Low Permeability Reservoirs After Steering Fracturing Stimulation[J]. Xinjiang Petroleum Geology, 2021, 42(1): 76-80.

Figures/Tables 5

References 18

[1]	张宪国, 张涛, 林承焰 , 等. 塔南凹陷复杂岩性低渗透储层测井岩性识别[J]. 西南石油大学学报(自然科学版), 2015,37(1):85-90.
	ZHANG Xianguo, ZHANG Tao, LIN Chengyan , et al. Lithology recognition with well logs in complex lithologic low permeability reservoirs in Ta’nan depression[J]. Journal of Southwest Petroleum University(Science ＆ Technology Edition), 2015,37(1):85-90.
[2]	曾凡辉, 马英恺, 郑建刚 , 等. 低渗透非均质气藏压裂水平井产量预测研究[J]. 钻采工艺, 2018,41(4):53-55.
	ZENG Fanhui, MA Yingkai, ZHENG Jiangang , et al. Study of horizonatal well production in non-homogeneous low permeability gas reservoir after fracturing[J]. Drilling & Production Technology, 2018,41(4):53-55.
[3]	周延军, 马新仿, 王建 . 低渗透油藏矩形井网水力压裂适应性研究[J]. 科学技术与工程, 2011,11(21):60-62.
	ZHOU Yanjun, MA Xinfang, WANG Jian . Adaptability research of rectangular pattern for hydraulic fracturing in low permeability reservoir[J]. Science Technology and Engineering, 2011,11(21):60-62.
[4]	王天驹, 陈赞, 王蕊 , 等. 致密砂岩油藏体积压裂簇间距优化新方法[J]. 新疆石油地质, 2019,40(3):351-356.
	WANG Tianju, CHEN Zan, WANG Rui , et al. A new method for cluster spacing optimization during volumetric fracturing in tight sandstone oil reservoirs[J]. Xinjiang Petroleum Geology, 2019,40(3):351-356.
[5]	刘文锋, 张旭阳, 张小栓 , 等. 致密油多段压裂水平井产能预测方法[J]. 新疆石油地质, 2019,40(6):731-735.
	LIU Wenfeng, ZHANG Xuyang, ZHANG Xiaoshuan , et al. A practical method to predict productivity of multistage fractured horizontal well in tight oil reservoirs[J]. Xinjiang Petroleum Geology, 2019,40(6):731-735.
[6]	武治岐, 王厚坤, 王睿 . 裂缝性致密油藏体积压裂水平井压力动态分析[J]. 新疆石油地质, 2018,39(3):333-339.
	WU Zhiqi, WANG Houkun, WANG Rui . Pressure behavior analysis of volume fracturing in horizontal wells in fractured tight oil reservoirs[J]. Xinjiang Petroleum Geology, 2018,39(3):333-339.
[7]	杜宗和, 李佳琦, 聂洪力 . 缝内二次转向压裂技术探索[J]. 新疆石油地质, 2013,34(3):349-353.
	DU Zonghe, LI Jiaqi, NIE Hongli . A probe of secondary deflection fracturing treatment in hydraulic fractures[J]. Xinjiang Petroleum Geology, 2013,34(3):349-353.
[8]	陈世栋, 惠芳, 陈博 , 等. 胡尖山油田A17区块暂堵转向压裂技术研究[J]. 石油化工应用, 2014,33(8):31-34.
	CHEN Shidong, HUI Fang, CHEN Bo , et al. Researching on temporary plugging and fracturing technology of A17 in Hujianshan oilfield[J]. Petrochemical Industry Application, 2014,33(8):31-34.
[9]	李建召, 杨兆中, 李玉涛 , 等. 暂堵转向压裂裂缝扩展轨迹研究[J]. 石油化工应用, 2015,34(8):26-31.
	LI Jianzhao, YANG Zhaozhong, LI Yutao , et al. Study on fracture propagation trajectory of temporary plugging and reoriented fracturing[J]. Petrochemical Industry Application, 2015,34(8):26-31.
[10]	谢朝阳, 尚立涛, 唐鹏飞 , 等. 大规模缝内转向压裂技术研究与试验[J]. 大庆石油地质与开发, 2016,35(2):66-69.
	XIE Chaoyang, SHANG Litao, TANG Pengfei , et al. Research and test of large-scale inside-seam steering fracturing technique[J]. Petroleum Geology & Oilfield Development in Daqing, 2016,35(2):66-69.
[11]	李晓峰, 张矿生, 卜向前 , 等. 老井重复压裂效果评价[J]. 石油地球物理勘探, 2018,53(增刊2):162-167.
	LI Xiaofeng, ZHANG Kuangsheng, BU Xiangqian , et al. Evaluations of repeated fracturings in old wells[J]. Oil Geophysical Prospecting, 2018,53(Supp.2):162-167.
[12]	任岚, 黄静, 赵金洲 , 等. 页岩气水平井重复压裂产能数值模拟[J]. 天然气勘探与开发, 2019,42(2):100-106.
	REN Lan, HUANG Jing, ZHAO Jinzhou , et al. Numerical simulation on productivity when shale-gas horizontal-well refracturing[J]. Natural Gas Exploration and Development, 2019,42(2):100-106.
[13]	李爱军 . 低渗透油藏单井产能预测新方法[J]. 新疆石油地质, 2011,32(6):667-668.
	LI Aijun . New method for prediction of well productivity in low permeability reservoir[J]. Xinjiang Petroleum Geology, 2011,32(6):667-668.
[14]	王明, 朱维耀, 李继山 , 等. 低渗透压裂井网两相渗流分析[J]. 中国矿业大学学报, 2010,39(5):779-783.
	WANG Ming, ZHU Weiyao, LI Jishan , et al. Two-phase porous flow of hydraulic fracturing patterns in low permeability oil reservoirs[J]. Journal of China University of Mining & Technology, 2010,39(5):779-783.
[15]	吴奇, 胥云, 王腾飞 , 等. 增产改造理念的重大变革:体积改造技术概论[J]. 天然气工业, 2011,31(4):7-12.
	WU Qi, XU Yun, WANG Tengfei , et al. The revolution of reservoir stimulation:an introduction of volume fracturing[J]. Natural Gas Industry, 2011,31(4):7-12.
[16]	刘晓虹, 林畅松, 刘俊 , 等. 低渗透储层产能预测的测井优化建模[J]. 西南石油大学学报(自然科学版), 2011,33(3):115-120.
	LIU Xiaohong, LIN Changsong, LIU Jun , et al. An optimization well logging interpretation model of production forecast in low-permeability sandstone reservoir[J]. Journal of Southwest Petroleum University(Science & Technology Edition), 2011,33(3):115-120.
[17]	王文东, 苏玉亮, 慕立俊 , 等. 致密油藏直井体积压裂储层改造体积的影响因素[J]. 中国石油大学学报(自然科学版), 2013,37(3):93-97.
	WANG Wendong, SU Yuliang, MU Lijun , et al. Influencing factors of stimulated reservoir volume of vertical wells in tight oil reservoirs[J]. Journal of China University of Petroleum(Edition of Natural Science), 2013,37(3):93-97.
[18]	赵金洲, 盛翠翠, 李勇明 , 等. 低渗透油藏多分支裂缝压力动态分析[J]. 科学技术与工程, 2015,15(7):53-58.
	ZHAO Jinzhou, SHENG Cuicui, LI Yongming , et al. Dynamic pressure analysis of multi-branch fractures in low permeability reservoirs[J]. Science Technology and Engineering, 2015,15(7):53-58.