一种缝洞型油气藏水体能量评价方法

A Method for Evaluating the Energy of Water in Fractured-vuggy Reservoirs

针对缝洞型油气藏水体能量评价困难的问题,在储层特征研究的基础上,运用物质平衡原理分析了缝洞型油藏见水前后油水产量变化规律,通过无因次简化得到产水、产油方程,经过无因次产水方程拟合分析及产油方程拟合验证,建立了一种新的缝洞型油藏有限水体能量的评价方法。综合考虑水体规模、避水高度及连通性等因素,以产水特征为研究对象,采用曲线拟合方法求取水体规模、避水高度及连通性等相关参数。

Aiming at the difficulty in the evaluation of water energy in fractured-vuggy reservoirs, based on the research of reservoircharacteristics, the change laws of oil and water production of the fractured-vuggy reservoirs before and after water breakthrough are ana-lyzed using the principle of material balance. The oil and water production equations are obtained by dimensionless analysis, and a meth-od for evaluating water energy in fractured-vuggy reservoirs is established through fitting analysis. Taking the characteristics of the waterproducing of the fractured-vuggy reservoirs as the research object, the relevant parameters to water energy such as the size of waterbody, the height of water avoidance and the connectivity of water body are obtained using the curve fitting method.