渤南地区BZ28-2S/N油田油水分布主控因素

doi:10.7623/syxb201205007

石油学报 ›› 2012, Vol. 33 ›› Issue (5): 790-797.DOI: 10.7623/syxb201205007

渤南地区BZ28-2S/N油田油水分布主控因素

孙永河 1　杨文璐 1　赵　荣 1　胡光义 2　范廷恩 2　袁红旗 1　刘　哲 1

1　东北石油大学地球科学学院　黑龙江大庆　163318；　2　中海油研究总院　北京　100027

收稿日期:2012-02-10 修回日期:2012-06-30 出版日期:2012-09-25 发布日期:2012-11-27
通讯作者: 孙永河
作者简介:孙永河，男，1979年1月生，2008年获大庆石油学院博士学位，现为东北石油大学副教授，主要从事含油气盆地构造分析与资源评价方面的科研与教学工作。
基金资助:
国家自然科学基金项目“裂陷盆地多边断层成因机制及其控藏机理”（No.41072163）、高等学校博士学科点专项科研基金课题“海拉尔-塔木察格盆地被动裂谷盆地成因机制研究”（No.20112322120002）资助。

Main controlling factors of the oil-water distribution in BZ28-2S/N oilfield，Bonan area

SUN Yonghe 1　YANG Wenlu 1　ZHAO Rong 1　HU Guangyi 2　FAN Ting’en 2　YUAN Hongqi 1　LIU Zhe 1

Received:2012-02-10 Revised:2012-06-30 Online:2012-09-25 Published:2012-11-27

摘要/Abstract

摘要：

渤南地区的BZ28-2S/N油田为下生上储模式，明化镇组下段目的层具有砂泥互层、泥包砂且油水关系复杂等特征。为了指导该油田开发区扩边，实现油田的增储上产，开展了油气成藏与油水分布主控因素研究。平面上油气主要分布在有效烃灶范围内，断裂下盘断块、背斜负花状断块和背斜断阶断块等正向构造为油气富集的有利部位。剖面上NmⅡ、NmⅠ和Nm0油组砂岩集中发育，在断裂活动时期有利于油气沿断裂运移时向其充注。NmⅡ油组顶部和NmⅠ油组顶部断裂带泥质含量相对高，在断裂活动趋于静止时，断层侧向封闭性相对更强，油气聚集程度也相对更高。控藏断裂主要为近EW—NEE向展布的规模较小的晚期张扭断裂，其分段生长的交叉或弯曲部位控制主力油区油气的充注运移，是断面油气垂向运移的优势通道。控藏断裂T₀₁断距小于150 m的区段在成藏期之后再活动强度小，对断层岩破坏程度低，控制了主力油区的油气保存。有利的钻探目标砂体为源断裂与砂体接触程度大的背斜砂体。

关键词: 正向构造, 分段生长, 活动强度, 断砂产状配置, 主控因素

Abstract:

The BZ28-2S/N oilfield in Bonan area has a petroleum system with the lower generation and upper accumulation pattern. The target interval of the lower Minghuazhen Formation is characteristic of sand-mud alternate layers, sand wrapped by mud and complicated oil-water relationship. In order to guide the expansion of development zones and to increase the reserves and production of the oilfield, we studied dominating factors for hydrocarbon accumulation and oil-water distribution. The results show that laterally, oil and gas are distributed mainly in a scope of the effective hydrocarbon kitchen, and positive structures, such as footwall fault block, anticline negative-flower-like fault block and anticline fault terrace, are favorable places for oil and gas accumulation. Vertically, there exist concentrated and developed sandstones in the NmⅡ, NmⅠ and Nm0 oil measures, which are readily charged by hydrocarbons migrating along faults during the active period of faults. Fault zones in top intervals of the NmⅡ and NmⅠ measures contain relatively more shale. When fault activity tends to rest, the lateral sealing of faults becomes relatively stronger and more hydrocarbons accumulate. Faults controlling reservoirs are mainly small-scale late tenso-shear faults distributed in nearly EW-NEE direction. The cross or bending part of segmented growth faults controls hydrocarbon charge and migration in the major province, and serves as an advantageous channel for vertical migration of hydrocarbons. After the hydrocarbon accumulation period, the T₀₁segment of faults that control reservoirs, with fault throw less than 150 m, had less damage on faulted rocks due to a lower re-activity, thus it controlled hydrocarbon reservation of the major province. A favorable sand body for the exploration target is the anticline sand body where the source fault is in wide contact with the sand body.

Key words: positive structure, segmented growth, activity intensity, occurrence matching of fault and sand body, main controlling factor

孙永河　杨文璐　赵　荣　胡光义　范廷恩　袁红旗　刘　哲. 渤南地区BZ28-2S/N油田油水分布主控因素[J]. 石油学报, 2012, 33(5): 790-797.

SUN Yonghe　YANG Wenlu　ZHAO Rong　HU Guangyi　FAN Ting’en　YUAN Hongqi. Main controlling factors of the oil-water distribution in BZ28-2S/N oilfield，Bonan area[J]. Editorial office of ACTA PETROLEI SINICA, 2012, 33(5): 790-797.

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渤南地区BZ28-2S/N油田油水分布主控因素

Main controlling factors of the oil-water distribution in BZ28-2S/N oilfield，Bonan area

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