蓬莱19-3特大型油田成藏条件及勘探开发关键技术

doi:10.7623/syxb201909010

石油学报 ›› 2019, Vol. 40 ›› Issue (9): 1125-1146.DOI: 10.7623/syxb201909010

蓬莱19-3特大型油田成藏条件及勘探开发关键技术

薛永安¹, 邓运华², 王德英¹, 杨海风¹, 吕丁友¹, 康凯¹

1. 中海石油(中国)有限公司天津分公司天津 300452;
2. 中海油研究总院北京 100028

收稿日期:2019-06-06 修回日期:2019-07-26 出版日期:2019-09-25 发布日期:2019-10-15
通讯作者: 薛永安,男,1963年10月生,1987年获武汉地质学院石油地质专业学士学位,2008年获中国地质大学(北京)矿产普查与勘探专业博士学位,现为渤海石油管理局总地质师、教授级高级工程师,长期从事海上油气勘探研究和管理工作。Email:xya@cnooc.com.cn
作者简介:薛永安,男,1963年10月生,1987年获武汉地质学院石油地质专业学士学位,2008年获中国地质大学(北京)矿产普查与勘探专业博士学位,现为渤海石油管理局总地质师、教授级高级工程师,长期从事海上油气勘探研究和管理工作。Email:xya@cnooc.com.cn
基金资助:
国家科技重大专项（2016ZX05024-003）资助。

Reservoir formation conditions and key exploration & development technoloiges in PL 19-3 giant oilfield

Xue Yong'an¹, Deng Yunhua², Wang Deying¹, Yang Haifeng¹, Lü Dingyou¹, Kang Kai¹

1. Tianjin Branch, CNOOC China Limited, Tianjin 300452, China;
2. CNOOC Research Institute, Beijing 100028, China

Received:2019-06-06 Revised:2019-07-26 Online:2019-09-25 Published:2019-10-15

摘要/Abstract

摘要：

蓬莱19-3油田是目前渤海湾盆地唯一一个油气储量达到十亿吨级的特大型整装油田。随着勘探开发的不断深入，为蓬莱19-3特大型油田的形成条件积累了丰富的资料。以油田勘探开发历程、油藏基本特征为基础，基于勘探开发中的地质、地球物理以及分析化验资料，综合论述了蓬莱19-3特大型油田成藏条件及油田成功勘探开发的关键技术。该特大型浅层油田形成的关键条件主要有4个方面：①蓬莱19-3油田位于与渤海最大的富生烃洼陷多脊斜坡短轴接触的凸起高部位，具有充足的油气来源，且运移条件极其优越；②新近系受郯庐断裂走滑活动控制形成完整大型扭断背斜，为油气的赋存提供充足的空间；③特殊的浅水三角洲沉积环境形成的不同于一般亿吨级油田的"多套复式储-盖组合体"，极大地增加了油气有效储存空间；④新构造运动期凸起与走滑的耦合，形成的大量断裂活动造成持续释压，与渤中凹陷晚期大量排烃相匹配，保证了油气的晚期持续强充注。这些特殊地质条件耦合作用控制了蓬莱19-3特大型油田的形成。另外，针对油田受走滑作用控制改造强烈、浅水三角洲特色沉积等特点，形成了实用性较强的勘探开发关键技术，主要有：气云区叠前深度偏移特色处理技术，基于地质体连续性模型高精度反演的薄互层地震预测技术，浅水辫状河三角洲沉积体系储层描述技术，大井距长井段合采油藏剩余油定量描述技术，复杂河流相油田中高含水期层系井网调整技术。

关键词: 蓬莱19-3特大型油田, 成藏条件, 多套复式储-盖组合体, 晚期持续油气强充注, 气云区, 勘探开发技术

Abstract:

The PL 19-3 oilfield is the only super-large monolithic oilfield with oil and gas reserves up to 10×10⁸t in Bohai Bay Basin, and it has been successfully developed. Exploration and development practices have provided abundant data for analyzing formation conditions of this super-large oilfield. On the basis of the exploration and development history, fundamental reservoir features, and with available geological, geophysical and test data, the hydrocarbon accumulation conditions and key exploration & development technologies of the PL 19-3 oilfield were discussed. The key conditions for forming the super-large Neogene oilfield include four aspects. (1)The oilfield is located at the high position of the uplift that contacts the brachy-axis of the multi-ridge slope in the biggest hydrocarbon-rich sag in Bohai Bay Basin, thus it has sufficient hydrocarbon source and extremely superior hydrocarbon migration condition. (2)The large-scale torsional anticlines which formed in the Neogene under the control of the Tanlu strike-slipping movement provide sufficient storage spaces for oil and gas preservation. (3)The "multiple sets of composite reservoir-caprock assemblages" developing in the special shallow-water delta further contributes greatly to the effective storage space for oil and gas preservation. (4)Due to the coupling of the uplift and strike slip in the neotectonic period, extensive faulting activities constantly released the pressure while the late period massive hydrocarbon expulsion of the Bozhong took place at the same time, which assures the constant and intense charging of oil and gas. The super-large PL 19-3 oilfield was controlled by the coupling effects of all those special geologic factors. In view of this oilfield's features (e.g. violently reformation caused by strike slip, and the special sedimentary environment of shallow-water delta), some key practical technologies for exploration and development have been developed. Such technologies include:the special prestack depth migration processing for gas cloud zones, the prediction of thin interbed reservoirs based on high-precision inversion of geologic model, the reservoir description for the shallow-water braided river delta, the quantitative description for remaining oil in the commingled oil reservoirs with wide well spacing and long well interval, and the well pattern adjustment for formations during high water cut period in the complex fluvial-facies oilfields.

Key words: PL 19-3 giant oilfield, formation condition, multiple composite reservoir-caprock assemblages, constant and intense charging of oil and gas during later period, gas cloud zone, exploration and development technology

中图分类号:

TE122

薛永安, 邓运华, 王德英, 杨海风, 吕丁友, 康凯. 蓬莱19-3特大型油田成藏条件及勘探开发关键技术[J]. 石油学报, 2019, 40(9): 1125-1146.

Xue Yong'an, Deng Yunhua, Wang Deying, Yang Haifeng, Lü Dingyou, Kang Kai. Reservoir formation conditions and key exploration & development technoloiges in PL 19-3 giant oilfield[J]. Acta Petrolei Sinica, 2019, 40(9): 1125-1146.

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蓬莱19-3特大型油田成藏条件及勘探开发关键技术

Reservoir formation conditions and key exploration & development technoloiges in PL 19-3 giant oilfield

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