桩139块边底水稠油油藏蒸汽吞吐开发措施效果的研究

Improve Development Performance of Cyclie Steam Simulation for Zhuang 139 Block Heavy Oil Reservoir with Edge and Bottom Water

针对桩西油田桩139块稠油油藏埋藏深、井斜度大、边底水活跃及高含水的开发现状,在重新进行精细油藏描述的基础上,对储层的非均质性、油水关系及构造特征取得了新的认识,提出在开发过程中立足蒸汽吞吐,完善相关配套工艺技术,综合运用局部井网加密、优化射孔井段、逐周期增加注汽强度,有针对性地实施氮气泡沫蒸汽吞吐缓解油藏边底水上升,注蒸汽伴注高温防膨剂降低注汽压力,措施实施后,单井吞吐效果较好,经济效益显著,对深层边底水稠油油藏的高效开发具有一定的指导意义。

Zhuang 139 block in Zhuangxi oilfield belongs to heavy oil reservoir, which is buried deep, large slope wells, actived edge and bottom water and high water cut. Precise reservoir description is conducted again to re- understand the heterogeneity, oil-water relation and the structure of reservoirs. Techniques areproposed in the devel- opment process based on steam stimulation, improving related technology, local well pattern thickening, optimizing perforating well section, increasing steam injection intensity cycle by cycle. Nitrogen bubble steam stimulation has been accordingly implemented to ease the rising edge and bottom water of reservoir. Injecting steam with high-tem- perature anti-swelling agent to reduce steam injection pressure. After implementing of these measures, single well cy- clic steam stimulation effect is improved, and economic bendfit is remarkable. This may guide the efficient develop- ment of edge and bottom water of deep heavy oil reservoir.