河南复杂断块油藏滚动勘探实践及认识

Practice and understanding of rolling exploration to complex  faulted-block reservoir in Henan

杨晓培

Yang Xiaopei

河南油田分公司勘探开发研究院，河南 南阳 473132

Explortion and Development Research Institute, Henan Oillfield Company, SINOPEC, Nanyang 473132, China

泌阳凹陷北部斜坡带中部 的新庄、王集和杨楼油田断层极为发育，由56个断块组成的一系列断块群，属复杂断块油藏，滚动勘探难度较大。近几年针对此类复杂断块油藏进行了滚动勘探开发的研究和实践，首先以油气成藏规律为指导，强化油气分布规律研究，认识到断裂系统是北部斜坡带控油和油气聚集的主要因素；其次以大断裂分布规律为基础，地震地质相结合，精确刻画断层产状；最后根据油藏具体特点优化井型及井型轨迹，提高油层钻遇率和产能，实现经济效益最大化，形成了一套行之有效的工作方法、步骤和流程。

The faults in Xinzhuang, WangJi and Yanglou Oilfields are well developed in the central part of northern slope belt, Biyang Sag. A series of faulted-block groups, composed by 56 fault blocks, belong to the complex faulted-block reservoir, which is very difficult to rolling exploration. In recent years, the research and practice of rolling exploration and development are conducted for such complex faulted-block reservoirs. First, the study of oil and gas distribution rule is strengthened based on the rules of hydrocarbon accumulation, which realizes that the fault system is the major factor of oil control and hydrocarbon accumulation in the northern slope belt. Secondly, on the basis of the distribution rules of large fault, the fault occurrence is depicted through combining seismic data with geological data. Finally, the well type and well trajectory are optimized according to the characteristics of reservoir, the encountering rate of oil reservoir and productivity are improved, which realizes the maximization of economic benefit and forms a set of effective methods, procedures and procesess.