二连盆地白垩系地层岩性油藏的勘探发现及前景

发布时间：2018-01-27 09:02

本文关键词： 地层岩性油藏勘探思路勘探发现勘探前景二连盆地　出处：《岩性油气藏》2017年02期 　论文类型：期刊论文

【摘要】：二连盆地为中新生代小型断陷湖盆群,是一个重要的油气生产区,油气勘探早期以构造油藏为主要对象,但随着勘探程度的不断加深,构造油藏发现的难度越来越大,原油产量迅速下降。为了寻找新的油气勘探与储量接替新领域,重新认识了二连盆地的油气成藏条件,认为区内具有湖盆范围小、多物源、快速沉积及相带变化快的地质特点,具备形成地层岩性油藏的有利条件。因此,提出了将勘探重点由构造油藏转变为地层岩性油藏的新思路,并结合勘探实践,探索形成了"资源评价定潜力—构造研究找背景—沉积研究寻砂体—综合研究建模式—滚动评价定规模"的地层岩性油藏的研究与勘探新方法。以新的方法为指导,在勘探多年仍未取得突破的巴音都兰凹陷等含油凹陷实现了油气勘探的新突破;同时,在新发现的阿尔凹陷,借鉴以往富油凹陷勘探的成功经验,注重地层岩性油藏的勘探,高效、快速地发现了亿吨级的阿尔油田。二连盆地地层岩性油藏的成功勘探,不仅开辟了该盆地油气勘探的新领域,而且对类似盆地的油气勘探起到了重要的借鉴作用。
[Abstract]:Erlian basin is a Meso-Cenozoic small faulted lacustrine basin group, which is an important oil and gas production area. In the early stage of oil and gas exploration, the main object of oil and gas exploration is structural reservoir, but with the deepening of exploration degree. The discovery of structural reservoirs is becoming more and more difficult, and the crude oil production is declining rapidly. In order to find new fields of oil and gas exploration and reserves replacement, the oil and gas reservoir forming conditions in Erlian Basin have been reunderstood. It is considered that the area has the geological characteristics of small lake basin, multi-material source, rapid deposition and rapid change of facies zone, and has favorable conditions for forming stratigraphic lithologic reservoir. A new idea of changing the exploration emphasis from structural reservoir to stratigraphic lithologic reservoir is put forward and combined with exploration practice. Exploration and formation of "Resource Evaluation potential-structural Research background-Sedimentary Research Sand-Finding body-Comprehensive Research Construction Model-Rolling Evaluation and fixed scale" New methods for research and exploration of stratigraphic lithologic reservoirs. A new breakthrough in oil and gas exploration has been realized in the oil-bearing sag such as the Bayindolan sag, which has not made a breakthrough in exploration for many years. At the same time, in the newly discovered Al sag, the successful exploration experience of the oil-rich sag in the past is used for reference, and the exploration of stratigraphic lithologic reservoirs is emphasized and highly efficient. The successful exploration of stratigraphic lithologic reservoirs in Erlian Basin has not only opened up a new field of oil and gas exploration in this basin. It also plays an important role in oil and gas exploration in similar basins.
【作者单位】：中国石油大港油田分公司;中国石油华北油田分公司勘探开发研究院;
【基金】：中国石油天然气股份有限公司重大科技专项“华北油田上产稳产800万吨关键技术研究与应用”(编号:2014E-35)资助
【分类号】：P618.13
【正文快照】： 0引言二连盆地位于内蒙古自治区,是一个由白垩纪小湖盆构成的断陷湖盆群。1981年,在阿南凹陷钻探阿2井并于下白垩统获得日产油27.1 t[1],从而发现了阿尔善油田。在随后的20年间,以含油凹陷内二级断裂构造带构造油藏为主要勘探对象,先后发现了12个油田,1995年原油产量达到125万

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