阿曼盆地A区白垩系泥岩充填型碳酸盐岩溶蚀沟谷识别技术

doi:10.12108/yxyqc.20230609

岩性油气藏 ›› 2023, Vol. 35 ›› Issue (6): 72–81.doi: 10.12108/yxyqc.20230609

阿曼盆地A区白垩系泥岩充填型碳酸盐岩溶蚀沟谷识别技术

范蕊¹, 刘卉¹, 杨沛广², 孙星¹, 马辉¹, 郝菲¹, 张珊珊¹

1. 中国石油东方地球物理公司研究院, 河北涿州 072750;
2. 中国石油勘探开发研究院, 北京 100083

收稿日期:2023-05-12 修回日期:2023-06-26 出版日期:2023-11-01 发布日期:2023-11-07
第一作者:范蕊(1989—),女,硕士,工程师,主要从事地震地质综合解释方面的研究工作。地址:(072750)河北省涿州市中国石油东方地球物理公司。Email:fanrui6@cnpc.com.cn。
基金资助:
中国石油天然气股份有限公司科学研究与技术开发项目“海外复杂碳酸盐岩精细勘探关键技术研究”(编号:2021DJ3104)资助

Identification of carbonate dissolution valleys filled with mudstones of Cretaceous in block A,Oman Basin

FAN Rui¹, LIU Hui¹, YANG Peiguang², SUN Xing¹, MA Hui¹, HAO Fei¹, ZHANG Shanshan¹

1. Research Institute of Bureau of Geophysical Prospecting Inc., CNPC, Zhuozhou 072750, Hebei, China;
2. PetroChina Research Institute of Petroleum Exploration & Development, Beijing 100083, China

Received:2023-05-12 Revised:2023-06-26 Online:2023-11-01 Published:2023-11-07

摘要/Abstract

摘要： 利用地震、钻井及测井等资料,结合地震正演模拟和地震属性,对阿曼盆地A区白垩系泥岩充填型碳酸盐岩溶蚀沟谷的地震反射特征及其展布规律进行了详细研究,并对该区油气成藏模式进行了刻画。研究结果表明:①阿曼盆地A区西部—中部发育1个泥岩充填型溶蚀沟谷体系,其在地震上表现为同相轴下凹、间断、弱振幅反射等特征,且地震资料可识别出深度大于3 m、宽度大于10 m的沟谷。②通过优选地震属性,发现研究区的欧拉曲率属性能更好地压制密集断层的影响,对溶蚀沟谷的识别效果优于相干属性和曲率属性。③新识别技术发现了一系列溶蚀沟谷-泥岩充填遮挡的复合型圈闭,面积共计80.66 km²,且新钻井揭示了其良好的油气显示,证实了该技术的可靠性。

关键词: 碳酸盐岩溶蚀沟谷, 泥岩充填遮挡, 正演模拟, 曲率属性, 白垩系, 阿曼盆地

Abstract: Based on seismic data,drilling and logging data,the seismic reflection characteristics and the distribution rules of carbonate dissolution valleys filled with mudstones of Cretaceous in block A of Oman Basin were studied by using seismic forward modeling and attributes,and the hydrocarbon accumulation model was determined. The results show that:（1）A dissolution valleys system filled with mudstones is developed in the west and middle of block A,Oman Basin,which is characterized by concave features,discontinuous reflection and weak amplitude. The dissolution valleys with depth greater than 3 m and width greater than 10 m could be identified using available seismic data.（2）By optimizing seismic attribute,it is found that Euler curvature could suppress the influence of dense faults and the effect of dissolution valleys identification is better than coherence and regular curvature attributes.（3）Combination traps of dissolution valleys filled with mudstones are identified whose total area is 80.66 km² by the new identification technology. In addition,good oil and gas shows was revealed by a new well,confirming the reliability of this technology.

Key words: carbonate dissolution valleys, mudstone-filled barrier, forward modeling, curvature attribute, Cretaceous, Oman Basin

中图分类号:

TE121.1

范蕊, 刘卉, 杨沛广, 孙星, 马辉, 郝菲, 张珊珊. 阿曼盆地A区白垩系泥岩充填型碳酸盐岩溶蚀沟谷识别技术[J]. 岩性油气藏, 2023, 35(6): 72–81.

FAN Rui, LIU Hui, YANG Peiguang, SUN Xing, MA Hui, HAO Fei, ZHANG Shanshan. Identification of carbonate dissolution valleys filled with mudstones of Cretaceous in block A,Oman Basin[J]. Lithologic Reservoirs, 2023, 35(6): 72–81.

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阿曼盆地A区白垩系泥岩充填型碳酸盐岩溶蚀沟谷识别技术

Identification of carbonate dissolution valleys filled with mudstones of Cretaceous in block A,Oman Basin

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