准中地区油气成藏关键期的厘定及其石油地质意义

谭绍泉

Tan Shaoquan

中国石化胜利油田分公司西部新区研究中心，山东 东营 257200

Research Center of New District in West China, Shengli Oilfield Company, SINOPEC, Dongying 257000, China

准噶尔盆地腹部为负向构造单元，埋藏深、经历多期构造活动，油气成藏条件复杂。通过含油储层砂体中烃类包裹体均一温度测试分析，明确侏罗系储层油气成藏期次；结合构造演化分析，确定油气成藏关键期油气成藏过程与构造演化关系。结果表明，准中侏罗系三工河组储层在地质时期至少发生2期油气充注，与现今油气分布关系密切的油气充注关键期处于早白垩世末或晚白垩世早期至古近系末。构造演化模拟结果反映成藏关键期处于盆地腹部南北掀斜之后，准中油气藏大多地方基本没有被调整或破坏。

Junggar Basin is a typical negative element which is accompanied by deep burial and complex tectonic activity. The test analysis on homogenization temperature distribution of fluid inclusion shows that the hydrocarbon accumulation period of Jurassic reservoir is defined clearly. Combined with the analysis of tectonic evolution, the relationship of hydrocarbon accumulation process and tectonic evolution is determined in hydrocarbon accumulation key period. The results show that the Jurassic Sanngonghe Formation reservoir has been existed at least 2-period hydrocarbon charging during geological period and the petroleum generation is closely related to oil and gas injection in the key period at the end of Early Cretaceous or early Late Cretaceous to Paleogene. Tectonic evolution simulation results indicates that the critical period is in the basin of North and South after abdomen tilt and the prospective oil and gas pools in most parts have no tuning or destruction basically.

10.6056/dkyqt201305002