为厘清连续封隔体充填控堵水机理及充填主控因素,通过建立裂缝充填数学模型,模拟充填施工过程中天然裂缝开度、裂缝走向、导流能力、充填程度、充填量随压力的变化,分析了影响充填施工过程的主要因素,并结合油田实际,总结了见效特点及原因。研究表明:裂缝初始开度、裂缝走向是影响控水施工过程的主要地质因素;充填过程中,特别是初期的泵注压力能否达到有效充填压力门槛,对裂缝封堵效果影响明显。该研究为措施井优选和效果评价提供了借鉴,为过饱和裂缝充填控水定量研究奠定基础。
In order to clear up the mechanism of water control and shutoff by continuous packer filling and the main controlling factors of filling, a mathematical model of fracture filling was established to simulate the changes in natural fracture opening, conductivity, filling degree, and filling volume with pressure in the filling process, the main factors affecting the filling process were analyzed, and the effectiveness characteristics and reasons were summarized in conjunction with the actual oilfield conditions. Research shows that the initial fracture opening and fracture direction are the main geological factors that affect the water control construction process; whether the pumping pressure in the filling process, especially in the initial stage, reach the threshold of effective filling pressure has a significant impact on the fracture plugging effect. This study provides a reference for the optimization and effect evaluation of measure wells, and lays a foundation for the quantitative study of water control by supersaturated fracture filling.
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