库车地区砂岩裂缝测井定量评价方法及应用

库车地区致密砂砾岩中普遍发育裂缝，可以利用测井资料计算裂缝宽度、裂缝孔隙度和渗透率等参数，以加深对该类储层的认识与评价。对高分辨率井壁成像测井资料进行处理和解释，确定裂缝宽度、裂缝孔隙度等参数，并采用模拟实验手段对其可靠性进行验证，以此为基础对双侧向测井响应进行校正和刻度，提出基于双侧向测井资料的裂缝宽度、裂缝孔隙度计算方法和模型，实现了在没有井壁成像测井资料的条件下定量计算与评价裂缝参数的目的。斯通利波传播特性与地层渗透性有关，从斯通利波中提取流动指数，建立渗透率模型，从而计算裂缝性砂砾岩储层总渗透率。实践表明，该方法在库车地区低孔低渗复杂储层评价中发挥了重要作用，取得良好效果。

QUANTITATIVE EVALUATION METHOD OF FRACTURING SANDSTONE RESERVOIR AND ITS APPLICATION IN KUQA AREA, THE TARIM BASIN

Fractures exist abundantly in sandstone in the Kuqa area, the quantitative parameters such as fracture width, fracture length, fracture porosity, etc. can be determined by using logging data in order to evaluate reservoirs more accurately. Firstly, the quantitative fracture parameters are obtained by borehole imaging log data processing and interpretation. The reliability is verified by simulated experiment. On the basis of it, another technique to determine fracture parameters using Dual Lateral Log (DLL) is proposed after corrected and calibrated. The propagation characteristics have relation to formation permeability. The movabilty index derived from the Stoneley wave is employed to set up models for formation permeability. By this way, the total permeability including pore permeability and fracture permeability is calculated. The occurrences of fracture in the reservoir mostly improve its permeability, thus decreasing the porosity lower limit and greatly increasing the net pay thickness.