水平井调流控水完井技术及优化设计方法

Completion Technology and Optimization Design Method of Self-adaptive Flow Control in Horizontal Well

针对浅层疏松砂岩油藏边底水突进导致水平井高含水问题,国内一些油田采用自适应调流控水筛管完井技术进行控水增油,但分段控水完井理论研究较少,相关参数设计采用常规喷嘴型控水阀的经验,无法满足水平井自适应控水筛管完井的设计科学性要求,影响了现场实施效果。研究了水平井自适应调流控水技术原理和分段工艺技术,建立了水平井各段存在流体性质差异、渗透率差异时的控水阀阀孔尺寸设计方法,优选了冀东油田浅层油藏的防砂筛管精度,形成了水平井自适应调流控水完井技术及优化设计方法,在冀东油田浅层边底水油藏应用中取得了明显的降水增油、延长中低含水采油期的效果。

In view of the problem of high water cut in horizontal wells caused by the edge and bottom water inrush in shallow unconsolidated sandstone reservoirs,some domestic oilfields use adaptive flow regulation and water control screen pipe completion technology to control water and increase oil production,but there is less theoretical research on staged water control completion,and the experience of using conventional nozzle type water control valve in the design of related parameters cannot meet the scientific requirements of the design of self-adaptive water control screen pipe completion in horizontal wells,which affects the on-site implementation effect.This paper studies the principle of self-adaptive flow regulation and water control technology for horizontal wells and sectional technology,establishes the design method of water control valve hole size when there are differences in fluid properties and permeability in each section of horizontal wells,optimizes the precision of sand control screen pipe for shallow reservoirs in Jidong Oilfield,forms the self-adaptive flow regulation and water control completion technology and optimization design method for horizontal wells,and obtains obvious effects of precipitation and oil increase,and prolonging the production period of medium and low water cut in the application of shallow edge and bottom water reservoirs in Jidong Oilfield.