川南泸州地区次级断裂识别及其油气意义  

Identification of secondary faults and hydrocarbon significance in Luzhou area,southern Sichuan

作　　者：谢凌峰 陈伟[1] 余养里 Xie Lingfeng;Chen Wei;Yu Yang Li(School of Earth Science and Technology,Southwest Petroleum University,Chengdu 610500)

机构地区：[1]西南石油大学地球科学与技术学院,四川成都610500

出　　处：《石化技术》2023年第2期152-154,共3页Petrochemical Industry Technology

基　　金：中国石油-西南石油大学创新联合体科技合作项目“川南深层海相页岩气多幕构造演化及构造裂缝预测技术研究(2020cx020101)”。

摘　　要：川南泸州地区页岩气产量高,为了明确其高产的因素。次级断裂以及裂缝影响着油气分布,但目前对于次级断裂以及裂缝的识别研究较少,仅仅通过地震剖面识别小尺度断裂具有一定的局限性。从区域构造特征,分析研究断裂形成机制、断裂分级;利用多种地震属性来识别次级断裂,对比其优点、缺点,选出最优的次级断裂识别方法。通过研究得出:泸州地区根据次级断裂的成因,分为伴生型次级断裂、走滑型次级断裂,剖面都具有断距小、多为次级褶皱、不容易识别等特点,基于3D恢复的曲率属性计算方法可较清晰地识别次级断裂平面展布特征,以此来分析次级断裂以及裂缝发育对油气聚集的影响,为油气勘探开发提供参考。Shale gas production in Luzhou area of southern Sichuan is high,in order to clarify the factors of its high production.Secondary faults and fractures affect the distribution of oil and gas.However,there are few studies on the identification of secondary faults and fractures,and the identification of small-scale faults only through seismic profiles has certain limitations.Based on the regional structural characteristics,the fault formation mechanism and fault classification are analyzed and studied.A variety of seismic attributes are used to identify the secondary faults,and the advantages and disadvantages are compared to select the optimal secondary fault identification method.Through the research,the following conclusions are drawn:Luzhou area according to the cause of secondary fracture,divided into the associated secondary faults,strike-slip fracture,secondary section has a small slip,mostly secondary folds and not easy to identify,curvature attribute evaluation method based on 3D recovery can clearly identify the secondary fracture plane distribution characteristics,in order to analysis the secondary fracture and fracture development influence on oil and gas gathering,It provides reference for oil and gas exploration and development.

关 键 词：泸州地区 五峰组 次级断裂 地震属性 

分 类 号：P618.13[天文地球—矿床学]