川西坳陷洛带气田沙溪庙组天然气成藏规律  

Gas reservoirs forming character in Shaximiao Formation, Luodai Gas-field , Chuanxi Depression

作　　者：王威[1] 徐国盛[1] 崔建伟[2] 廖义沙[1] 

机构地区：[1]成都理工大学"油气藏地质及开发工程"国家重点实验室,四川成都610059 [2]中国石油塔里木油田规划计划处,新疆库尔勒841000

出　　处：《油气地质与采收率》2007年第5期39-41,113,共3页Petroleum Geology and Recovery Efficiency

基　　金：国家重点基础研究发展规划"973"项目"中国典型叠合盆地深部流体与浅部流体相互作用及其成藏效应"(G1999043309)资助

摘　　要：洛带气田沙溪庙组气藏成藏受古构造、烃源岩、储层、运聚和保存条件等诸多因素的控制。沙溪庙组发育多种类型有利储集砂体,天然气运移的通道主要是切源断层及与之衔接的裂缝网络系统。洛带构造沙溪庙组在平面上和纵向上均处于天然气运移的过路地带,同时局部地区发育向上的跨层断裂,导致一部分天然气运移到上覆地层中聚集成藏,为此洛带构造沙溪庙组无法形成大规模的气藏。天然气遵循早期聚集成藏,中晚期调整气藏定型的成藏规律。Palaeostructure, source rocks, reservoirs, migration and accumulation, and preservation conditions and some other factors controlled the formation of Shaximiao Formation gas reservoirs of Luodai Gasfield. Many types of favorable reservoir sandbody developed in Shaximiao Formation. Main migration channels of the natural gas were source-cutting faults and connected fracture network system. Shaximiao Formation in Luodai structure lies in the passageway zones of the natural gas migration in the lateral and vertical. Upward cross-layer faults developed in partial area at the same time, which results in a part of the natural gas migrated into the overlying formations and accumulated to reservoir. So large scale of gas reservoir could not form in Shaximiao Formation, Luodai structure. The gas reservoir forming has the character of accumulating in early period,and adjusting and formalizing in middle-late period.

关 键 词：次生气藏 成藏条件 成藏规律 沙溪庙组 洛带气田 

分 类 号：TE112.31[石油与天然气工程—油气勘探]