Structural Characteristics of Strike-Slip Fault and Its Control on Fluid Distribution in the East Ⅱ Block of the Sulige Gas Field, Ordos Basin

doi:10.19657/j.geoscience.1000-8527.2023.045

Abstract

Abstract:

Due to the complex structure of strike-slip faults in the East Ⅱ Block of the Sulige Gas Field in Ordos Basin, the fluid differential enrichment regularity and distribution characteristics under fault control are unclear, which hamper the optimization and development adjustment of favorable target of the local target layer.To resolve the above problems, based on the fine geological interpretation of seismic data, the fault structural analysis was carried out in this study.The staging characteristics of faults and their differential control effect on fluid distribution were defined.The results show that: (1) The local strike-slip faults have two types of 5 type section structural styles,i.e. single fault type and combination type, and five types of plane structural styles, are combined on the plane i.e.linear, oblique, overlapping, feathered and braidedtypes, (2) The strike-slip fault experienced three stages of tectonic evolution: Caledonian-early Yanshanian extrusion, middle and late Yanshanian strike-slip, and Himalayan extension.From deep to shallow strata, the fault structure underwent the evolution of single fault-type, flower-like, and Yanshanian-type.According to the different fault structural styles, three segment of linear shear segment, derived shear segment and mixed shear segment are developed from west to east. (3) Faults with different structural styles control different fluid differential enrichment modes.Four types of fluid differential enrichment modes are developed in the study area, namely the single-fault-closed-stable production rise type, assembly-open and low-yield rapid decline type, and shear-semi-open and low-yield slow decline type.Among them, the single-fault-closed-stable production rising type and the drawing-semi-open and high-yield slow decline type have higher daily gas production and cumulative gas production and stable production, which are the main local natural gas enrichment area.Our results reveal the important controlling effect of strike-slip fault on fluid differential enrichment in tight sandstone reservoirs, and point out the direction for local further development and adjustment.

Key words: strike-slip fault, section structural characteristic, plan structure style, stage evolution regularity, segmented development characteristic, fluid differential enrichment

CLC Number:

SONG Qing, SUN Panke, XIANG Jinyuan, TIAN Fajin, LÜ Fengqing, JIA Langbo, JIANG Shiyi, SHEN Yuhao, XU Huaimin, ZHANG Lin, HE Taihong, FANG Xiangyang. Structural Characteristics of Strike-Slip Fault and Its Control on Fluid Distribution in the East Ⅱ Block of the Sulige Gas Field, Ordos Basin[J]. Geoscience, 2023, 37(05): 1110-1122.

Figures/Tables 11

Fig.1 ectonic location, local structural characteristics of the study area, and the gas-water plane distribution map of the lower submember of He_8 Formation ((a) modified from reference[12])

Fig.2 Comprehensive stratigraphic column of the study area

Fig.3 Tectonic stress variations in the study area

Fig.4 Seismic profile characteristics and plane combination diagram of strike-slip fault in the study area

Fig.5 Analytical model of strike-slip fault structures in the study area

Fig.6 Characteristics of fault evolution sequence of different structural layers in the study area

Fig.7 Planar segmentation characteristics of the strike-slip fault

Table 1 Differential evolution structures of fault flat section in stages and sections

分布位置	断层走向	断层期次
分布位置	断层走向	加里东期-早燕山期		中晚燕山期		喜山期
线性拉分西段	NWW- SEE、EW	逆断层	剖面直立平面线性	张扭断层	剖面直立、Y型平面线性、雁列状	正断层	剖面直立平面线性、雁列状
派生剪切中段	EW、NEE- SWW	逆断层	剖面直立平面线性	张扭断层	剖面半花状、负花状平面辫状、羽状、辫状	正断层、张扭断层	剖面直立、负花状平面线性、斜列、雁列状
混合剪切东段	NWW- SEE、EW	逆断层	剖面直立平面线性	张扭断层	剖面直立、负花状平面线性、辫状	正断层	剖面直立平面线性、雁列状

Fig.8 Fluid distribution and production differences in faults with different genesis and tectonic styles

Fig.9 Vertical composition variation of natural gas in target intervals of the study area

Fig.10 Natural gas migration trend and fluid distribution pattern in the derived shear section

References 32

[1]	贾承造, 郑民, 张永峰. 中国非常规油气资源与勘探开发前景[J]. 石油勘探与开发, 2012, 39(2): 129-136.
[2]	田军, 杨海军, 朱永峰, 等. 塔里木盆地富满油田成藏地质条件及勘探开发关键技术[J]. 石油学报, 2021, 42(8): 971-985. DOI
[3]	付金华, 董国栋, 周新平, 等. 鄂尔多斯盆地油气地质研究进展与勘探技术[J]. 中国石油勘探, 2021, 26(3): 19-40.
[4]	马德波, 汪泽成, 段书府, 等. 四川盆地高石梯—磨溪地区走滑断层构造特征与天然气成藏意义[J]. 石油勘探与开发, 2018, 45(5): 795-805. DOI
[5]	邓兴梁, 闫婷, 张银涛, 等. 走滑断裂断控碳酸盐岩油气藏的特征与井位部署思路: 以塔里木盆地为例[J]. 天然气工业, 2021, 41(3): 21-29.
[6]	柳永军, 朱文森, 杜晓峰, 等. 渤海海域辽中凹陷走滑断裂分段性及其对油气成藏的影响[J]. 石油天然气学报, 2012, 34(7): 6-10.
[7]	陈冬霞, 王雷, 庞雄奇, 等. 断裂对川西坳陷致密砂岩气藏天然气运聚的控制作用[J]. 现代地质, 2013, 27(5): 1137-1146.
[8]	兰晓东, 吕修祥, 朱炎铭, 等. 走滑断裂与盖层复合成藏模式: 以塔中东部中古51井区鹰山组为例[J]. 石油与天然气地质, 2014, 35(1): 107-115.
[9]	李相文, 冯许魁, 刘永雷, 等. 塔中地区奥陶系走滑断裂体系解剖及其控储控藏特征分析[J]. 石油物探, 2018, 57(5): 764-774. DOI
[10]	韩剑发, 苏洲, 陈利新, 等. 塔里木盆地台盆区走滑断裂控储控藏作用及勘探潜力[J]. 石油学报, 2019, 40(11): 1296-1310. DOI
[11]	焦方正, 杨雨, 冉崎, 等. 四川盆地中部地区走滑断层的分布与天然气勘探[J]. 天然气工业, 2021, 41(8): 92-101.
[12]	付金华, 范立勇, 刘新社, 等. 苏里格气田成藏条件及勘探开发关键技术[J]. 石油学报, 2019, 40(2): 240-256. DOI
[13]	付金华, 喻建, 徐黎明, 等. 鄂尔多斯盆地致密油勘探开发新进展及规模富集可开发主控因素[J]. 中国石油勘探, 2015, 20(5): 9-19.
[14]	李熙喆, 张满郎, 谢武仁. 鄂尔多斯盆地上古生界岩性气藏形成的主控因素与分布规律[J]. 石油学报, 2009, 30(2): 168-175. DOI
[15]	李潍莲, 纪文明, 刘震, 等. 鄂尔多斯盆地北部泊尔江海子断裂对上古生界天然气成藏的控制[J]. 现代地质, 2015, 29(3): 584-590.
[16]	罗开平, 杨帆, 陆永德, 等. 鄂尔多斯盆地杭锦旗地区关键构造期与二叠系致密气成藏响应[J]. 石油实验地质, 2021, 43(4): 557-568.
[17]	齐荣, 李良. 鄂尔多斯盆地杭锦旗地区泊尔江海子断裂以北有效圈闭的识别[J]. 石油实验地质, 2018, 40(6): 793-799.
[18]	齐荣. 鄂尔多斯盆地杭锦旗东部断裂特征及对天然气成藏的影响[J]. 特种油气藏, 2019, 26(4): 58-63.
[19]	徐立涛, 石万忠, 吴睿, 等. 泊尔江海子断层分段演化特征及其对太原—山西组的控制作用[J]. 石油地球物理勘探, 2020, 55(4): 884-891, 704.
[20]	YANG M H, LI L, ZHOU J, et al. Segmentation and inversion of the Hangjinqi fault zone, the northern Ordos Basin (North China)[J]. Journal of Asian Earth Sciences, 2013, 70/71: 64-78. DOI URL
[21]	YANG M H, LI L, ZHOU J, et al. Mesozoic structural evolution of the Hangjinqi area in the northern Ordos Basin, North China[J]. Marine and Petroleum Geology, 2015, 66: 695-710. DOI URL
[22]	赵振宇, 郭彦如, 王艳, 等. 鄂尔多斯盆地构造演化及古地理特征研究进展[J]. 特种油气藏, 2012, 19(5): 15-20, 151.
[23]	刘池洋, 赵红格, 桂小军, 等. 鄂尔多斯盆地演化-改造的时空坐标及其成藏(矿)响应[J]. 地质学报, 2006, 80(5): 617-638.
[24]	ZHOU R, LIU D N, ZHOU A C, et al. A synthesis of Late Paleozoic and Early Mesozoic sedimentary provenances and constraints on the tectonic evolution of the northern North China Craton[J]. Journal of Asian Earth Sciences, 2019, 185: 104029. DOI URL
[25]	张岳桥, 施炜, 廖昌珍, 等. 鄂尔多斯盆地周边断裂运动学分析与晚中生代构造应力体制转换[J]. 地质学报, 2006, 80(5): 639-647.
[26]	张文忠, 郭彦如, 汤达祯, 等. 苏里格气田上古生界储层流体包裹体特征及成藏期次划分[J]. 石油学报, 2009, 30(5): 685-691. DOI
[27]	韩载华, 赵靖舟, 陈梦娜, 等. 苏里格气田西区盒8段储层流体包裹体特征与成藏期次[J]. 西安石油大学学报(自然科学版), 2020, 35(1): 18-27.
[28]	郭振华, 陈红汉, 赵彦超, 等. 利用储层流体包裹体确定鄂尔多斯盆地塔巴庙区块上古生界油气充注期次和时期[J]. 现代地质, 2007, 21(4): 712-718, 737.
[29]	ANEES A, ZHANG H C, ASHRAF U, et al. Identification of favorable zones of gas accumulation via fault distribution and sedimentary facies: Insights from Hangjinqi area, northern Ordos Basin[J]. Frontiers in Earth Science, 2022, 9: 822670. DOI URL
[30]	夏义平, 刘万辉, 徐礼贵, 等. 走滑断层的识别标志及其石油地质意义[J]. 中国石油勘探, 2007, 12(1): 17-23, 48, 92.
[31]	叶素娟, 朱宏权, 李嵘, 等. 天然气运移有机-无机地球化学示踪指标: 以四川盆地川西坳陷侏罗系气藏为例[J]. 石油勘探与开发, 2017, 44(4): 549-560. DOI
[32]	刘全有, 刘文汇, 徐永昌, 等. 苏里格气田天然气运移和气源分析[J]. 天然气地球科学, 2007, 18(5): 697-702.