渤海海域走滑反转构造带油气运聚与调整
——以旅大22-27地区为例

旅大22?鄄27走滑反转构造带位于渤海辽东湾南部海域，是渤海油田勘探程度最高的地区之一。受郯庐断裂挤压作用影响，在本区形成了典型的走滑反转构造，并且在构造演化历程中始终处于较高的构造位置，是油气运聚的有利指向区。为查明该区油气成藏规律，从地化、钻井和地震等资料入手，通过对成藏期次和成藏时间的分析，首次提出该区东营组存在形成古油藏和现今油藏的2期油气成藏过程：其中古油藏形成于中新世晚期，现今油藏形成于上新世晚期；同时对2期成藏事件及条件进行了重点剖析，明确了喜山运动对本区油气成藏的控制作用，总结了本区油气逸散与富集机理，再现了本区的成藏过程，指出油气聚集的有利目的层系为浅层明下段和馆陶组，为下一步勘探指明了方向。

Lvda 22-27 strike-slip inversion structure zone which is located in south Liaodong Bay of Bohai sea is one of the areas with the highest exploration degree in Bohai Oilfield. Influenced by Tan-Lu fault compression, typical strike-slip inversion structure is formed and is always in high position in the course of tectonic evolution, which is the favorable area for hydrocarbon accumulation. To identify the rules of hydrocarbon accumulation in this area, through analyzing the hydrocarbon accumulation period and time, and based on the geochemistry, drilling and seismic data, ancient reservoir and present reservoir of Dongying Formation are proved: ancient reservoir is formed in Late Miocene and present reservoir is formed since Late Pliocene. At the same time, this paper analyzes the hydrocarbon accumulation events and conditions, and defines the controlling role of Himalayan movement on hydrocarbon accumulation. It also sums up the hydrocarbon effusion and enrichment mechanism in this area, reappears the oil and gas accumulation process. At last, it is pointed out that the shallow layer such as the lower section of Minghuazhen Formation and Guantao Formation are considered as the favorable hydrocarbon accumulation layers, which are next step prospecting directions.

10.6056/dkyqt201306004