萨中开发区高台子油层合理井网加密方式

REASONABLE WELL PATTERN INFILLING FORM OF GAOTAIZI RESERVOIRS IN MIDDLE SAERTU DEVELOPMENT BLOCK

大庆油田长垣高台子油层目前已进入高含水后期开发，开发过程中，暴露出了由于注采井网不完善而引起的一系列开采矛盾，原有300 m×300 m井距正方形反九点法面积井网已不适应目前的开发现状。因此选取萨中开发区北一区断西高台子九点法典型区块进行了储层精细地质建模和历史拟合，在此基础上进行了高台子油层井网加密调整方式优化设计，从技术指标和经济指标综合分析，优选出了在原井网4口井中间加密油井，将原反九点井网的油井全部转注，形成注采井距为212 m×212 m的五点法面积井网开发方式，为大庆油田高台子油层下步加密调整提供理论依据。

At present, development of Gaotaizi reservoirs in Daqing Placanticline has reached the later period of high water cut. In the course of this development, because of incomplete well pattern, a series of production contra- dictions have highlighted , and the original 300m x 300m square inverse 9-spot well pattern has not matched the cmTent development conditions. Therefore a typical block of the above pattern in the reservoirs is chosen in Duanxi of Block North 1 in Middle Saertu development block to conduct fnely geological modeling and history match. On the basis of the above, the optimal design of the well pattern by infilling and adjusting in Gaotaizi reservoirs has been conducted. With the help of the combined analysis from viewpoints of technical and economical indexes, one infill oil well among 4 original wells has been chosen and optimized, and furthermore the oil wells in original invert 9-spot well patterns have totally inverted into injection wells, thus 5-spot aerial well patterns with 212m× 212m in- jection-production well spacing has formed. In a word, the above adjustment has provided the theoretical foundation for the further infilling of Gaotaizi reservoirs in Daqing Oilfields.