摘要
综合分析桥口构造的成藏条件认为：桥口地区段是主力生烃层系，亚段和Es1为区域性盖层，沙三段的泥岩对分隔多套油气系统有重要作用；油气分布纵向为上油下气，平面上油藏主要分布在构造高部位，气藏主要分布在构造翼部；油气藏规模较小，多为断块油气藏；桥口翼部具有广泛的岩性油气藏成藏条件。主要有三项控油因素：油气源控制了油气平面的分布；继承性隆起与断裂控制油气运聚；沉积相带也影响了油气分布。
Having been analyzed the reservoir-forming conditions of Qiaokou structure comprehensively, it is believed that the upper Es4 member and Ed submember are the major source rocks in Qiaokou area. The upper Es2 member and Es1 member serve as regional seals.The mudstone beds in Es3 member play an important role in isolating the multireservoir systems. Longitudinally, petroleum distribution is that the oil lies upon the gas. Areally, oil-reservoirs mainly occur at the higher parts of the structure, and gas reservoirs at the flank parts. Reservoirs are small in dimensions, rnostly fault-block ones. Lithoreservoir-forming conditions widely exist around the flanks of Qiaokou structure.There are three factors controll ing the petroleum: ro the petroleum sources controlling the areal distribution of oil and gas; ②the successional uplifts and faults controlling the hydrocarfor migration and accumulation;③the sedimentary facies belts affecting the petroleum distribution.
出处
《断块油气田》
CAS
2000年第3期8-10,共3页
Fault-Block Oil & Gas Field
关键词
桥口构造
成藏条件
油气勘探
油气运移
Qiaokou structure, Reservoir forming conditions, Factors controlling the Petroleum, Exploration
