埕南断裂带断块油藏分类评价研究

Research on Classification and Evaluation of Fault Block Reservoir in Chengnan Fault Zone

埕南断裂带具有优越的成藏条件和良好的勘探开发前景,但该带断裂系统破碎复杂,断块成藏规律研究难度大。为此,通过充分运用创新新技术开展低序级断层识别、断块精细解剖以及断块成藏规律分析方面的研究。以基础资料为基础,以该带复杂断块成藏区域为载体,针对低序级断层识别难度大的问题,采用相干属性与倾角属性相融合技术识别低序级断层;针对目前解释精度无法满足勘探开发需要的问题,创新提出运用“四小法”开展断块精细解剖,实现该带构造特征精细刻画;进一步对该带断块组合样式进行分类分析其成藏规律,并对已开发油藏的断块类型梳理对照,总结不同类型断块油气成藏规律。总结了埕南断裂带油气成藏规律,西段在Es易于成藏,中段在Ng和Ed易于成藏,东段在Ed和Es1易于成藏的规律。通过该项研究,实现了该带埕南12-平11块的精细解剖并部署实施产能建设取得良好效果,同时也为研究同类复杂断裂带勘探开发潜力提供了新的研究思路。

The Chengnan fault zone has excellent hydrocarbon accumulation conditions and good prospects for exploration and development,but the fracture system in this zone is complex and it is difficult to study the law of fault block accumulation.To this end,research on the identification of low-order faults,fine anatomy of fault blocks,and analysis of fault block accumulation laws is carried out through the full innovation and application of new technologies.Based on the basic data and the complex fault block accumulation area in this belt as the carrier,in view of the difficulty in identifying low-order faults,the technology of fusion of coherent attributes and dip attributes is used to identify low-order faults;the current interpretation accuracy cannot be satisfied.For the problems needed for exploration and development,innovatively proposed the use of the"four small methods"to carry out fine anatomy of fault blocks to realize the fine description of the structural characteristics of the belt;further classify and analyze the accumulation rules of the fault block combination styles of the belt,and analyze the developed oil reservoirs The types of fault blocks are combed and compared,and the rules of hydrocarbon accumulation in different types of fault blocks are summarized.The law of hydrocarbon accumulation in the Chengnan fault zone is summarized.The western section is easy to accumulate in Es,the middle section is easy to accumulate in Ng and Ed,and the eastern section is easy to accumulate in Ed and Es1.Through this research,the fine anatomy of the CN12-P 11 block in the belt was realized and the deployment and implementation of production capacity construction achieved good results.At the same time,it also provided new research ideas for studying the exploration and development potential of similar complex fault zones.