摘要
准噶尔盆地东部白家海—五彩湾地区具有多源、多期次成藏的特点。从地质构造背景出发,分析研究区油气成藏动力学系统形成的基本条件;通过对地温场、压力场、流体势及流体化学性质综合分析,探讨了这些要素与生排烃、油气运移、聚集等之间的关系,从时间和空间上恢复油气成藏的地质过程。通过对研究区油气成藏静态要素和动态要素分析,提出白家海—五彩湾地区油气成藏流体动力学系统划分方案,将该系统划分为白家海凸起它源开放型油气成藏动力学系统和五彩湾凹陷自源半封闭型成藏动力学系统。油气成藏动力学系统的划分为今后该区的勘探提供了新思路,在白家海凸起以寻找多向充注型油气藏为主,在五彩湾凹陷以寻找自生自储型油气藏为主。
Baijiahai-Wucaiwan area in eastern Junggar basin is characterized by multi-source and multi-stage hydrocarbon accumulations.This paper analyzes the essential conditions for forming dynamic system of hydrocarbon accumulation in this studied area in terms of the geologic structural setting.Through comprehen-sive analyses of geothermal field,pressure field,fluid potential and fluid chemical property,it discusses the relations among these factors and generation and expulsion of hydrocarbon,hydrocarbon migration and accumu-lation as well as time-space geologic process for reestablishing hydrocarbon accumulation.Based on study of the static and dynamic factors,a program for classification of the fluid dynamic system of hydrocarbon accu-mulation in Baijiahai-Wucaiwan area is proposed,that is,the system can be divided into an allogenic open system in Baijiahai salient and a self-source and semi-enclosed system in Wucaiwan sag,Such a classification offers new thoughts for further exploration in this area.In Baijiahai salient it is dominated by searching for multi-orientation oil/gas-filled or secondary reservoirs,while in Wucaiwan sag by finding self-source and self-reserved pools.
出处
《新疆石油地质》
CAS
CSCD
2002年第4期302-305,共4页
Xinjiang Petroleum Geology
