西南石油大学学报（自然科学版）2016，Vol.38Issue(4)：123-129,7.DOI:10.11885/j.issn.1674-5086.2014.06.09.03
安塞地区加密井地层压力预测研究
Research on Formation Pressure Predictionin in Ansai Area Infilling
摘要
Abstract
Ansai Oilfield infill experimental zone is located in the mid-west Wangyao zone. After long-time development,the composite water cut reaches 58.9%,geological reserves recovery degree 11.8%;formation pressure system is in disorder,and natural fracture and fracture cracks co-exist. Therefore,the prediction of formation pressure of encryption test wells is difficult and drilling safety is at risk. Based on the analysis of Ansai experimental area and on the basis of geological characteristics,we studied the difference between formation pressure in the process of water injection and the original formation pressure,trying to accurately determine reservoir pressure distribution water after injection. We introduced the seepage theory of fractured formation after water injection in the process of the formation pressure prediction,and suggest calculation method for infilled wellbore formation permeability tensor of complex crack formation and prediction methods for infilling of formation pressure. Applying these methods to the prediction of formation pressure of experimental zone in Ansai produced highly accurate results that satisfy the need of safe drilling fluid density window The influence of the characteristic of cracks on infill well formation pressure is also analyzed,which can provide practical guidance for infill well drilling safety.关键词
安塞油田/加密井/地层压力/安全钻井/密度窗口Key words
Ansai Oilfield/infill well/formation pressure/safe drilling/density window分类
能源科技引用本文复制引用
王勇茗,吴学升,周文军..安塞地区加密井地层压力预测研究[J].西南石油大学学报（自然科学版）,2016,38(4):123-129,7.基金项目
国家自然科学基金（51274168）。 （）
