辽河坳陷西部凹陷潜山油气输导体系特征

doi:10.3969/j.issn.1006-6535.2022.04.007

摘要/Abstract

摘要： 针对辽河坳陷西部凹陷潜山油气输导体系特征、规模增储勘探方向不明确等问题,运用构造特征和演化史分析方法,结合典型潜山油气藏解剖,按潜山与成熟烃源岩接触关系,将西部凹陷潜山划分为源内、源边和源外3种类型,建立了不同类型潜山的油气输导模式。研究结果表明:西部凹陷源内型潜山具有裂缝型储层-断裂-不整合复式油气输导条件,输导体系最为有利,发育风化壳和内幕油气藏;源边型潜山单边以断面或不整合为主要输导通道,潜山含油气性及幅度受控于供油窗口的大小及潜山储层的发育程度;源外型潜山以通源断层为油气垂向运移通道,不整合为横向运移通道,主要发育风化壳型潜山油藏。研究成果对西部凹陷潜山下一步勘探方向和有利目标的优选具有重要的意义。

关键词: 潜山, 输导体系, 源内型, 源边型, 源外型, 辽河坳陷

Abstract: To address the problems of unidentified characteristics of the hydrocarbon transmission system and unclear direction of on-scale reserve stimulation and exploration of hydrocarbon transmission system in Buried Hills, West Sag, Laiohe Depression, the buried hill in West Sag were classified as intra-source, source-edge and extra-source types by the analysis method of tectonic characteristics and evolutionary history, the studies on typical buried hill reservoirs, and the contact relationship between buried hills and mature source rocks, and hydrocarbon transmission model of different types of buried hills was established. The study results showed that, the intra-source buried hills in West Sag were developed with complex hydrocarbon transmission conditions, such as fractured reservoir, fault and nonconformity, and the transmission system was the most favorable, with weathered crust and internal reservoirs developed; source-edge buried hills were laterally developed with fault plane or unconformity as main transmission channel; the hydrocarbon content and amplitude of the buried hill were controlled by the size of oil supply window and the development degree of buried hill reservoir; in extra-source buried hills, source-connected fault served as hydrocarbon migration channel while the unconformity served as the horizontal migration channel, and weathered-crust buried hill reservoir was mainly developed. The results of the study are of great significance to the next exploration trend and the selection of favorable targets in the buried hills in West Sag.

Key words: buried hill, migration system, intra-source type, source-edge type, extra-source type, Liahe Depression

中图分类号:

TE122.1

鞠俊成. 辽河坳陷西部凹陷潜山油气输导体系特征[J]. 特种油气藏, 2022, 29(4): 55-61.

Ju Juncheng. Hydrocarbon Transmission System Characteristics of Buried Hills in West Sag, Liaohe of Depression[J]. Special Oil & Gas Reservoirs, 2022, 29(4): 55-61.

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