下刚果盆地北部中新统深水浊积岩储层及含油性地震预测

doi:10.7623/syxb201501004

石油学报 ›› 2015, Vol. 36 ›› Issue (1): 33-40.DOI: 10.7623/syxb201501004

下刚果盆地北部中新统深水浊积岩储层及含油性地震预测

解吉高, 刘春成, 刘志斌, 张益明, 刘方, 焦振华, 肖曦

中海油研究总院北京 100027

收稿日期:2014-07-16 修回日期:2014-11-06 出版日期:2015-01-25 发布日期:2014-12-09
通讯作者: 解吉高, 男, 1979年9月生, 2003年获成都理工大学资源勘查工程专业学士学位, 2008年获中国石油大学(北京)地球探测与信息技术专业硕士学位, 现主要从事油气储层地球物理方法技术研究工作.Email:xiejg@cnooc.com.cn
作者简介:解吉高, 男, 1979年9月生, 2003年获成都理工大学资源勘查工程专业学士学位, 2008年获中国石油大学(北京)地球探测与信息技术专业硕士学位, 现主要从事油气储层地球物理方法技术研究工作.Email:xiejg@cnooc.com.cn
基金资助:
国家重大科技专项"南海深水区油气勘探地球物理关键技术"(2011ZX05025001)资助.

Seismic prediction of the reservoir and oil-bearing property of Miocene deep-water turbidite in northern Lower Congo Basin

Xie Jigao, Liu Chuncheng, Liu Zhibin, Zhang Yiming, Liu Fang, Jiao Zhenhua, Xiao Xi

CNOOC Research Institute, Beijing 100027, China

Received:2014-07-16 Revised:2014-11-06 Online:2015-01-25 Published:2014-12-09

摘要/Abstract

摘要：

下刚果盆地北部中新统地层发育大型的深水浊积体,形成了一批典型的构造岩性复合圈闭,水深500~1 500 m,钻探成本高,钻前的储层预测及油气检测是降低该区油气勘探风险的主要手段.通过分析下刚果盆地中北部Mohm油田、KTNSM油田和Tomboco油田中新统浊积砂岩含油气储层的岩石物理特征和地震响应特征,推导出利用叠后地震属性描绘地震数据体中的强振幅在空间的分布形态;用纵波/横波速度比属性预测具有浊积水道展布形态的地震异常体的岩性;在砂岩储集体刻画基础上,用叠前重构的泊松阻抗技术有效识别砂岩孔隙内的流体类型这一技术组合.运用这一技术组合,在下刚果盆地中北部H区块内钻前识别和发现了新的潜力勘探目标,并预测和描述了这些潜力目标在空间的分布范围与特征.部分目标经钻井证实,实钻结果与钻前预测完全一致,取得了较好的实际应用效果,对下刚果及其他西非海岸盆地的浊积砂岩储层及油气预测具有借鉴和参考意义.

关键词: 下刚果盆地, 中新统, 浊积岩, 纵波/横波速度比, 泊松阻抗

Abstract:

Large scale turbidite bodies are developed in Miocene stratum in northern Lower Congo Basin, and form a number of typical stractural-lithologic combination traps. High drilling cost is caused by deep water of 500-1 500 m. Then reservoir and oil-gas detection before drilling is the main way to reduce the risk of oil and gas exploration in this area. The spatial distribution pattern of the strong amplitude in seismic data volume described using post-stack seismic attributes can be derived by analyzing the petrophysical properties and seismic response characteristics of the oil-bearing reservoir of Miocene turbidite sandstone in Mohm, KTNSM and Tomboco oilfields in northern and central Lower Congo Basin; the lithology of seismic anomaly bodies with turbidite channel distribution pattern can be predicted using P-S wave velocity ratio; and based on the description of sand reservoirs, the fluid type in sandstone pore can be effectively identified with pre-stack reconstructed Poisson impedance technique. By applying the combination of techniques above, new potential exploration targets are identified and discovered before drilling in Block H in northern and central Lower Congo Basin, and their spatial distribution scope and characteristics are also predicted and described. It is proved for some targets that the actual drilling results are completely identical with the pre-drilling prediction, achieving a good practical application effect and providing a reference for prediction of reservoirs and oil-gas resources in the turbidite sandstone of Lower Congo Basin and other coastal basins in West Africa.

Key words: Lower Congo Basin, Miocene, turbidite, P-S wave velocity ratio, poisson impedance

中图分类号:

TE112

解吉高, 刘春成, 刘志斌, 张益明, 刘方, 焦振华, 肖曦. 下刚果盆地北部中新统深水浊积岩储层及含油性地震预测[J]. 石油学报, 2015, 36(1): 33-40.

Xie Jigao, Liu Chuncheng, Liu Zhibin, Zhang Yiming, Liu Fang, Jiao Zhenhua, Xiao Xi. Seismic prediction of the reservoir and oil-bearing property of Miocene deep-water turbidite in northern Lower Congo Basin[J]. Acta Petrolei Sinica, 2015, 36(1): 33-40.

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下刚果盆地北部中新统深水浊积岩储层及含油性地震预测

Seismic prediction of the reservoir and oil-bearing property of Miocene deep-water turbidite in northern Lower Congo Basin

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