川西什邡地区隐伏断层活动性及其对流体的控制作用  

THE ACTIVITIES OF THE CONCEALED FAULTS AND THEIR CONTROL OVER THE FLUIDS IN SHIFANG AREA,WESTERN SICHUAN

作　　者：庞河清[1] 王多义[1] 蔡左花[1] 程建[1] 黄耀综[1] 邓祖林 李幸运[1] 唐蓉[3] 蒋增平[3] 

机构地区：[1]成都理工大学能源学院,四川成都610059 [2]核工业280研究所,四川广汉618300 [3]中国石油西南油气田分公司川西北气矿,四川邛崃611500

出　　处：《物探与化探》2010年第1期14-18,共5页Geophysical and Geochemical Exploration

基　　金：国家自然科学基金应急项目资助(40841012)

摘　　要：利用遥感地质解译、土壤微量元素分析、土壤氡气测量以及野外露头观察等手段,在什邡湔氐地区识别出22条隐伏断层。它们按走向可分为北北西向、北东东向和近东西向3组。受关口断层推覆上升的影响,隐伏断层普遍具张扭性,活性较好,含水破碎带发育。从油气水文地球化学和地下水的活动规律来探讨该区断裂和盖层、地下水的配置关系,认为本区油气保存条件总体较差,但在单斜带局部区域寻找水动力圈闭气藏以及在云西—徐家场鼻状背斜上勘探深层气藏仍然有一定的潜力。Using quite a few methods such as the interpretation of the remote sensing geology, the analysis of the trace elements in soil, the survey of the gas radon in soil and the observation of the field outcrop, the authors identified 22 concealed faults in Jiandi area of Shifang. These faults can be classified into three groups, striking NNW, NEE and approximately EW respectively. Influenced by nappe rising of Guankou fault, most of the concealed faults show obvious tenso-shear activities, and zones of water-bearing fractures are well developed. In this paper, hydrogeochemistry of oil and gas and regularity of groundwater activities were used to investigate the configuration relationship between the fractures, cap rocks and groundwater in this area. The authors hold that there exists some potential in search for gas reservoirs of the hydrodynamic trap in some areas of the monoclinic belt and in exploring deep gas reservoirs in the Yunxi-Xujiaehang nose-shaped anticline, in spite of the fact that the overall conditions of the oil and gas preservation in this area are poor.

关 键 词：川西什邡地区 关口断层 遥感地质解译 土壤地球化学 水动力圈闭 油气勘查 

分 类 号：P632[天文地球—地质矿产勘探] TP79[天文地球—地质学]