塔里木盆地哈拉哈塘地区碳酸盐岩油气富集规律

doi:10.3969/j.issn.1006-6535.2021.02.006

摘要/Abstract

摘要： 哈拉哈塘地区是塔里木盆地主要的含油区带,受多期构造运动影响,油气富集规律预测难度大。为此,基于地震资料解释,对哈拉哈塘地区热瓦普区块深层碳酸盐岩的断裂展布、成藏期古构造进行系统研究。储层展布及产能数据分析结果表明:研究区次级NE—SW向、NW—SE向及近SN向分支断裂对油气进行二次调整运移,在其上倾倾末端储层发育终止区富集成藏;油气沿优势运移方向,长期处于古构造鼻状隆起区及局部构造高点叠合区的储层利于油气保存。基于断裂及古构造分析,结合储层特征,建立了“X”型走滑断裂由南向北疏导油气,其伴生的次级分支断裂对油气进行二次调整运移,沿油气优势运移方向、在多期古构造隆起或局部构造高点叠合的储层发育区油气富集的成藏模式。研究结果可为碳酸盐岩油气勘探开发提供一定的借鉴。

关键词: 断裂展布, 古构造, 岩溶储层, 成藏模式, 哈拉哈塘地区

Abstract: The Halahatang area is the main oil-bearing zone in the Tarim Basin. It is difficult to predict the law of hydrocarbon accumulation due to the influence of multi-period tectonic movements. For this reason, based on the interpretation of seismic data, a systematic study was conducted for the fault distribution and paleostructure in hydrocarbon accumulation period of the deep carbonate reservoirs in the Rewapu block in the Halahatang area. As indicated by the analysis results of reservoir distribution and productivity data, the secondary migration of oil and gas was adjusted by branch faults in NE-SW, NW-SE and near SN direction in the study area, and oil and gas were accumulated in the reservoir development termination area at the updip end of the faults; oil and gas migrated along the dominant migration direction, and the reservoirs that have long been located in the nose-shaped uplift area of the paleostructure and the overlapping area of local tectonic high points were conducive to oil and gas preservation. Based on the analysis of faults and paleostructures, combined with the characteristics of the reservoir, a hydrocarbon accumulation model was established with an “X”-shaped strike-slip fault used to channel oil and gas from south to north, and its associated secondary branch faults to adjust the secondary migration of oil and gas along the direction of the dominant oil and gas migration, finally enabling oil and gas to accumulate in reservoir development area located in the uplift area of the paleostructure and the overlapping area of local tectonic high points.

Key words: fault distribution, paleostructure, karst reservoir, accumulation model, Halahatang Area

中图分类号:

TE122.2

祝渭平, 孙东, 姚清洲, 房启飞, 代冬冬. 塔里木盆地哈拉哈塘地区碳酸盐岩油气富集规律[J]. 特种油气藏, 2021, 28(2): 41-48.

Zhu Weiping, Sun Dong, Yao Qingzhou, Fang Qifei, Dai Dongdong. The Law of Hydrocarbon Accumulation in Carbonate Reservoirs in Halahatang Area, Tarim Basin[J]. Special Oil & Gas Reservoirs, 2021, 28(2): 41-48.

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