西南石油大学学报（自然科学版）2018，Vol.40Issue(2)：115-128,14.DOI:10.11885/j.issn.1674-5086.2017.03.22.03
超低渗透油藏水平井注采井网设计优化研究
Optimization Study of the Horizontal Well and Injection-production Pattern in an Ultra-low-permeability Reservoir
摘要
Abstract
This study forms the basic principle of an injection-production well design for a horizontal well in an ultra-low-permeable reservoir based on the understanding of the breakthrough,effect analysis,and mining rule of the horizontal well in an ultra-low-permeable reservoir to solve the problem of stable production.The following points are discussed:(1) the expanding range of the three-dimensional space of an artificial pressure crack is the foundation of the injection-production pattern design;(2) the direction of the well arrangement is perpendicular to the maximum principal stress;(3) the lateral displacement of the well network is the main supplementary energy;(4) the well spacing,distance,and horizontal section length should be optimized to improve the water flooding control area ratio;and (5) spacing must be reduced and an effective use of the gap between the reserves must be realized to improve the intensity of the single section.The technical direction and policy of further improving the development effect of horizontal wells are put forward based on the basic principles of the injection-production well pattern design along with the combination of field statistics and theoretical analysis to (1) improve the level of the single segment output;(2) improve the level of the well network pressure and optimize the well spacing for 500-600 m (the horizontal segment lengths of the reservoirs of the Ⅰ,Ⅱ,and Ⅲ classes were 500-550 m,450-500 m,and 400-450 m,respectively,and the reservoir row spacings of the Ⅰ,Ⅱ,and Ⅲ classes were 150,120～130,and 100～120 m,respectively;(3) optimize the water injection intensity of the single well using the technique of low and moderate water injection;and (4) determine the reasonable initial output of the horizontal well using the relationship between the amount of deposit,distance,and velocity of the water line.The reasonable production flow pressure injection was slightly greater than the saturation pressure before the water injection was effective,and was not less than 2/3 of the saturated pressure.关键词
超低渗透/水平井/见效程度评价方法/注采井网/优化调整/适应性Key words
ultra-low permeability/horizontal well/evaluation method of effective degree/injection-production pattern/optimization adjustment/adaptability分类
能源科技引用本文复制引用
樊建明,屈雪峰,王冲,张庆洲,王选茹..超低渗透油藏水平井注采井网设计优化研究[J].西南石油大学学报（自然科学版）,2018,40(2):115-128,14.基金项目
国家科技重大专项(2017ZX05013-004) （2017ZX05013-004）
中石油股份公司重大科技专项(2016E-0505) （2016E-0505）
