准噶尔盆地吉木萨尔凹陷二叠系全油气系统地质特征与勘探开发实践

doi:10.3969/j.issn.1672-7703.2023.04.002

摘要/Abstract

摘要： 为了深入剖析吉木萨尔凹陷二叠系含油气系统，对烃源岩、沉积物源体系、构造演化和源储时空匹配关系进行研究，认为吉木萨尔凹陷二叠系具备形成全油气系统的地质条件。平面上由凹陷中部向边缘依次发育页岩油、致密油、常规砂砾岩油藏3个带，纵向上围绕二叠系芦草沟组优质烃源岩自下而上发育致密油、页岩油、常规砂砾岩油藏，油气整体呈现“全油气系统”成藏特点。以该认识为指导，3种类型油藏勘探均取得突破，基本形成满凹含油、多层多类型油藏叠合有序共生态势。立足大平台、多套层系立体开发模式，最大限度实现效益动用的思路和技术在实践中逐渐成熟。解剖吉木萨尔凹陷二叠系全油气系统地质特征、成藏模式和勘探开发实践，对丰富全油气系统勘探理论，指导相似富油凹陷的勘探开发具有重大意义。

关键词: 全油气系统, 有序共生, 立体开发, 二叠系, 吉木萨尔凹陷

Abstract: Based on the study of source rock, sediment source system, tectonic evolution and dynamic matching relationship between hydrocarbon source and reservoir, the Permian oil and gas bearing system in Jimsar Sag is analyzed in detail. The study results indicate that the Permian in Jimsar Sag has favorable geological conditions for forming full oil and gas system. On the plane, shale oil, tight oil, conventional glutenite oil reservoirs are distributed in sequence from the central to the marginal sag, and tight oil, shale oil, conventional glutenite oil reservoirs are distributed upward around the high-quality source rock in Lucaogou Formation, showing the overall hydrocarbon accumulation characteristics of “full oil and gas system”. Guided by this understanding, breakthroughs have been made in the exploration of three types of oil reservoirs, basically forming a pattern of oil bearing in the whole sag and orderly co-occurrence and superposition of multi-layer and multi type oil reservoirs. By applying the large platform and multi-layer stereoscopic development mode, the exploration idea and technology for maximizing the benefit resource utilization are gradually mature in practice. The detailed analysis of geological characteristics, hydrocarbon accumulation pattern, and exploration and development practice of the Permian full oil and gas system in Jimsar Sag is of great significance for enriching the exploration theory of the full oil and gas system and guiding the exploration and development in similar oil rich sags.

中图分类号:

TE112.1

支东明, 李建忠, 杨帆, 康积伦, 张伟, 马强, 陶林本. 准噶尔盆地吉木萨尔凹陷二叠系全油气系统地质特征与勘探开发实践[J]. 中国石油勘探, 2023, 28(4): 14-23.

Zhi Dongming, Li Jianzhong, Yang Fan, Kang Jilun, Zhang Wei, Ma Qiang, Tao Linben. Geological characteristics and exploration and development practice of the Permian full oil and gas system in Jimsar Sag, Junggar Basin[J]. China Petroleum Exploration, 2023, 28(4): 14-23.

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