录井技术在渤海油田太古界变质岩裂缝识别中的应用

doi:10.3969/j.issn.1672-9803.2023.01.019

摘要/Abstract

摘要： 渤海油田对于太古界潜山的勘探开发力度逐步增大,先后发现并开发了JZ 25-1南太古界潜山油气藏、BZ 19-6特大型潜山凝析气藏,有力证实渤海油田太古界潜山具备极高的勘探潜力。太古界潜山岩性以变质花岗岩为主,油气储集空间主要为裂缝,裂缝发育程度对油气藏规模评价影响巨大,所以实现太古界变质岩裂缝的快速识别对勘探作业快速决策具有重要意义。通过研究发现,太古界潜山裂缝研究大多聚焦于变质岩储层的储集空间表征、裂缝表征、控制因素、储层分带和测井评价等方面,缺乏录井技术定量识别裂缝的研究。采用钻井参数曲线交会法、井漏法、岩心观察法、壁心观察法、岩屑微观特征法、薄片鉴定描述法将太古界变质岩裂缝分级描述为米级裂缝、毫米-厘米级裂缝、微米级裂缝、致密段4个级别。其在渤海油田近30口井的成功应用,为潜山油气勘探重大突破起到了关键的作用,对太古界变质岩潜山油气勘探的随钻决策具有重要意义。

关键词: 太古界潜山, 变质岩储层, 裂缝分级, 录井技术, 渤海油田

Abstract: The exploration and development of the Archean buried hill in Bohai Oilfield has gradually increased, and the Jinzhou 25-1 South Archean buried hill oil & gas reservoirs and Bozhong 19-6 extra-large buried hill condensate gas reservoirs have been discovered and developed successively, which strongly confirmed that the Archaean buried hill in Bohai Oilfield has high exploration potential. The lithology of Archean buried hill is mainly metamorphic granite, and the oil & gas reservoir space is mainly fractures. The development degree of fractures has a great impact on the evaluation of the scale of oil & gas reservoirs. Therefore, the rapid identification of Archean metamorphic rock fractures is of great significance to the rapid decision-making of exploration operations. It is found that the study of Archean buried hill fractures mostly focuses on the characterization of metamorphic rock reservoir space, fracture characterization, control factors, reservoir zoning and logging evaluation, and lacks the study of quantitative identification of fractures by mud logging technology.This paper classifies and describes the Archean metamorphic rock fractures into four categories, namely, meter scale fractures, millimeter-centimeter scale fractures, micron scale fractures and dense segments, through the intersection of drilling parameter curves,lost circulation method, core observation method, wall core observation method, micro-characteristic method of cuttings, and thin section identification description method. The successful application of nearly 30 wells to Bohai Oilfield has played a key role in the major breakthrough of buried hill oil and gas exploration, and is of great significance to the decision-making while drilling of oil and gas exploration in Archean metamorphic buried hill.

Key words: Archean buried hill, metamorphic reservoir, crack classification, mud logging technology, Bohai Oilfield

中图分类号:

TE132.1

李战奎, 郭明宇, 马金鑫, 刘广明, 张恒, 魏雪莲. 录井技术在渤海油田太古界变质岩裂缝识别中的应用[J]. 录井工程, 2023, 34(1): 121-129.

LI Zhankui, GUO Mingyu, MA Jinxin, LIU Guangming, ZHANG Heng, WEI Xuelian. Fracture identification mud logging technology and application to Archean metamorphic reservoirs in Bohai Oilfield[J]. Mud Logging Engineering, 2023, 34(1): 121-129.

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