塔河油田X区奥陶系油藏差异化治理对策

Differential countermeasures for Ordovician reservoirs in X area, Tahe oil field

张莉 王佳乐 犹佳雨 张莹 王喜林 高慧 甘丽丽

Zhang Li Wang Jiale You Jiayu Zhang Ying Wang Xilin Gao Hui Gan Lili

中国石化 西北油田分公司 采油一厂, 新疆 轮台 841604 2. 中国石化 西北石油局, 乌鲁木齐 830011

No. 1 Oil Production Plant, SINOPEC Northwest Company, Luntai, Xinjiang 841604, China 2. Northwest Petroleum Bureau, SINOPEC, Urumqi, Xinjiang 830011, China

塔河X区位于塔河油田东北部构造高点，奥陶系风化顶面呈北高南低形态，区块残丘较发育，储集体以裂缝-溶洞型储层为主，区块整体连通性相对较差，各区域动态开发特征存在一定差异性。中西部油井储集体较发育，油气富集；西部存在底水锥进风险，稳产难度大；中部油井能量不足，采出程度低；东南部区域构造位置相对较低，油层厚度薄，含水上升速度快，控水治水效果不明显。针对差异化特征，结合动静态分析，提出相应的控制合理采速、注水替油、单元注水、单井和小单元注气治理对策，进一步深化奥陶系油藏开发认识，在一定程度上提高区块产能、减缓递减，同时对后期扩大产能建设规模、提高储量动用有一定的借鉴意义。

The X area is located in the northeastern structural high of the Tahe oil field. The surface of Ordovician weathering crust is lower in the south and higher in the north. Monadnocks are well developed in the study area. Fractures and caves work as the main reservoirs. Due to poor connectivity, the dynamic characteristics of hydrocarbon exploration vary among areas. The central and western parts, with well-developed reservoirs, are abundant in hydrocarbon. The western part faces a risk of bottom water coning, hence is difficult to stabilize crude output. Wells in the central part have poor formation energy, and show a low recovery rate. The southeastern area has a relatively lower tectonic location and thin hydrocarbon layer, is featured by fast water-cut rising and poor water control effect. For differential characteristics, based on dynamic and static analyses, this study presents some corresponding countermeasures, such as reasonable mining speed control, injecting water to replace oil, water injection unit, single and unit well gas injection. Besides, this study deepens the knowledge on Ordovician reservoir exploitation, improvea area productivity to a certain extent, and slows down oil production decline. Furthermore, this study provides a guidance and reference significance to expand productivity construction and improve producing reserve.

https://doi.org/10.11781/sysydz2016S1056