塔里木盆地雅克拉地区古近系低幅构造圈闭落实及有利目标评价
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1.长江大学地球科学学院 武汉;2.中国石化西北油田分公司 乌鲁木齐

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P618.130.2+2

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中石化科研攻关项目


Exploration of Paleogene Low-amplitude Structure Traps and Evaluation of Favorable Targets in the Yakla area of the Tarim Basin
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1.School of Geosciences,Yangtze University,Wuhan;2.Sinopec Northwest China Petroleum Bureau,Urumchi

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    摘要:

    雅克拉地区位于塔里木盆地北部。2021年老井复查显示,雅克拉YK6H区块古近系库姆格列木组新增石油探明地质储量86.70×104t,目前已发现的油气藏构造幅度低,相似低幅构造圈闭识别难度大,且成藏条件的匹配关系不明确。为寻找新的油气开发有利区带、加强剩余油藏的开发。该文以雅克拉地区高精度三维地震资料为基础,以高精度层序地层学理论为指导,对雅克拉地区开展了高精度地层划分与对比分析;通过蚂蚁体提取、层位自动追踪、变速成图技术,识别了105条微断裂、提高了低幅度构造的识别精度、落实了最小闭合高度为2米的低幅构造圈闭的分布;通过构造位置、圈闭特征、沉积储层及油气运移通道等控藏要素,对新落实的低幅度构造圈闭进行分析评价,通过类比评价法,对新落实的构造圈闭进行了有利目标优选,并综合分析得到该区的有利成藏区带。总结了适用于低幅构造圈闭的构圈闭-储层-运聚成藏三元素匹配控制成藏目标的“三元控藏”有利目标优选方法,为相似地质条件地区的有利目标评价提供借鉴。

    Abstract:

    The Yakla region is located in the northern part of the Tarim Basin. The review of old wells in 2021 shows that the new proven geological reserves of oil in the Paleogene Kumgelim Formation in the YK6H block of Yakla are 86.7×104t, and the structural amplitude of the oil and gas reservoirs that have been discovered so far is low, and it is difficult to identify similar low-amplitude structural traps, and the matching relationship between the accumulation conditions is not clear. In order to find new favorable zones for oil and gas development and strengthen the development of remaining oil reservoirs. Based on the high-precision 3D seismic data of the Yakla area and guided by the theory of high-precision sequence stratigraphy, the high-precision stratigraphic division and comparative analysis of the Yakla area are carried out. Through ant body extraction, automatic layer tracking, and variable velocity mapping technology, 105 micro-faults were identified, the identification accuracy of low-amplitude structures was improved, and the distribution of low-amplitude structural traps with a minimum closure height of 2 meters was implemented. Based on the reservoir control factors such as structural location, trap characteristics, sedimentary reservoirs and oil and gas migration channels, the newly implemented low-amplitude structural traps are analyzed and evaluated, and favorable targets are selected, and then the favorable reservoir zones are comprehensively analyzed. This paper summarizes the "three-element reservoir control" favorable target optimization method suitable for low-amplitude structural traps, which is suitable for low-amplitude structural traps, and provides a reference for the evaluation of favorable targets in areas with similar geological conditions.

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费 娥,李 涛,周吉春,等. 塔里木盆地雅克拉地区古近系低幅构造圈闭落实及有利目标评价[J]. 科学技术与工程, , ():

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  • 收稿日期:2024-04-03
  • 最后修改日期:2024-05-09
  • 录用日期:2024-05-22
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