塔里木盆地孔雀河地区复合含油气系统与有利勘探方向  

Composite petroleum system and favorable prospecting directions in the Kongquehe area of the Tarim basin

作　　者：汤达祯[1] 邢卫新[2] 孔凡军[3] 李丹梅[1] 许浩[1] 陶树[1] 高冠峰[1] 

机构地区：[1]中国地质大学(北京),北京100083 [2]中国石油化工集团公司国际石油勘探开发有限公司,北京100083 [3]中国石油化工集团公司河南油田分公司地质研究院,河南南阳473132

出　　处：《地学前缘》2008年第2期167-177,共11页Earth Science Frontiers

基　　金：中国石油化工集团公司省部级重大科研项目(XBKY04)

摘　　要：运用叠合盆地复合含油气系统的描述方法和评价思路,分析了塔里木盆地孔雀河地区含油气系统复合特征,再现从源岩到圈闭的油气地质演化过程。孔雀河地区含油气系统以断裂复合贯通为主,同时存在不整合面复合贯通,构成寒武系C—(!)—下奥陶统O1(!)—石炭系C(*)—三叠系T(*)—侏罗系J(*)+寒武系—C(!)—下奥陶统O1(*)—志留系S(*)—泥盆系D(*)—侏罗系J(*)改造型复合含油气系统(*)。含油气系统的复合经历3个关键时刻:泥盆纪末是构造格局与古油藏形成期,侏罗纪末和白垩纪末是油气转化、重新分配与油藏调整期。研究区可分为破坏散失区、改造调整区、深埋保存区,其中改造调整区、深埋保存区为有利油气聚集区,处在改造调整区的龙口背斜和维马克—开屏背斜的上古生界和中生界的断背斜圈闭以及下古生界残留古断背斜圈闭是最佳勘探目标。Guided by the description methods and evaluation routine for the composite petroleum system in superimposed basins, we have studied the composite characteristics of petroleum system in the Kongquehe area of the Tarim Basin and revealed the geological evolution processes of hydrocarbon from source rock to trap. The petroleum systems in the Kongquehe area, mainly through fault composite linkage combined with unconformity surface composite linkage, constitute the Cambrian ∈（!）- Lower Ordovician O1 （!）- Carboniferous C（ ＊ ）- Triassic T（ ＊ ）- Jurassic J（ ＊ ） ＋Cambrian ∈（ !）- Lower Ordovician O1 （ ＊ ）- Silurian S （ ＊ ）- Devonian D （ ＊ ）- Jurassic J（ ＊ ）modified composite petroleum systems（ ＊ ）. There are three critical periods for the composite petroleum system such as the end of the Devonian for forming tectonic framework and paleoreservoir, the end of the Jurassic and the Cretaceous for hydrocarbon transformation, redistribution and reservoir adjustment. The research area may be classified into three types, they are the destructed dissipation zone, the reconstructed adjustment zone and the deep buried preservation zone, among which the reconstructed adjustment zone and the deep buried preservation zone are the favorable area for hydrocarbon accumulation. Especially, the Upper Paleozoic and the Mesozoic faulted anticline traps of Longkou anticline and Weimake-Kaiping anticline and the residual faulted paleo-anticline traps of the Lower Paleozoic in the reconstructed adjustment zone are the best prospecting targets.

关 键 词：复合含油气系统 成藏模式 有利勘探方向 孔雀河斜坡 塔里木盆地 

分 类 号：TE122.31[石油与天然气工程—油气勘探]