巨厚块状普通稠油油藏二次开发研究

Secondary development of massive heavy oil reservoir

张新元 2

长江大学石油工程学院，湖北 武汉 430100 中国石油辽河油田公司勘探开发研究院，辽宁 盘锦 124010

College of Petroleum Engineering, Yangtze University, Wuhan 430100, China Research Institute of Exploration and Development, Liaohe Oilfield Company, PetroChina, Panjin 124010, China

辽河油区L断块区属常温注水开发的巨厚块状稠油油藏，动用程度是影响此类油藏高效开发的关键因素。鉴于油藏下部油层动用较好，而上部油层动用有限，通过数值模拟手段研究了隔层对注入水的封隔能力，并根据油层及隔层发育状况，将区块分2个部分进行二次开发部署。主体部位进行直井与水平井组合注水开发，可增大注水波及体积；下部油层较为发育区部署水平井挖潜，提高区块的储量动用程度，实现二次开发，提高区块最终采收率。

Block L area of Liaohe Oilfield is a massive heavy oil reservoir developed through room temperature water injection. Producing degree is a key factor of affecting the efficient development of similar reservoir. In view of a good producing degree of the lower oil layer and the limited producing of upper oil layer, the isolation performance of barrier bed on water injection is studied through numerical simulation. The block is separated into two parts to conduct the secondary development deployment according to the development status of reservoir and barrier bed. Secondary development deployment of combined water injection of vertical well and horizontal well is conducted in the main parts, which can enlarge the swept volume of water injection. Horizontal well is deployed in the development area of lower reservoir in order to increase the reserves producing degree of the block and to realize the secondary development, which improves the final recovery efficiency.

10.6056/dkyqt2012z1008