新疆塔北低阻油气储层导电模型--双水泥质骨架导电模型

对前人提出的泥质分布型、双水型、岩石骨架等导电模型的剖析,发现有的模型没有区分微孔隙水与地层水的性质和导电路径;有的模型没有区分微孔隙水和粘土水的导电路径;有的模型没有考虑泥质分布形式和泥质数量等.为此,吸取了这些模型的优点,克服其不足,结合新疆塔北地区泥质砂岩低阻油气储层的特征及成因,建立了一个新的泥质砂岩导电模型--双水泥质骨架导电模型(Dual-Water Clay Matrix Conductive Model,缩写为DWCMCM),双水是自由水和微孔隙水,泥质骨架是含有粘土水的粘土颗粒.DWCMCM区分不同水的性质和导电路径,并考虑了泥质分布形式和泥质数量,因此DWCMCM评价新疆塔北地区泥质砂岩低阻油气储层的结果与实际储层情况相符.     

储层原始含油饱和度计算方法研究

储层原始含油饱和度是评价储层的重要指标 ,它的计算方法有 :岩心直接测定方法、间接确定法和毛管压力曲线计算方法。简要地讨论了这几种方法 ,重点探讨了利用毛管压力曲线计算储层原始含油饱和度的方法 ,针对该方法目前使用中存在的问题进行了改进 ,并在该方法的理论基础上 ,结合新疆塔里木盆地北部的实例 ,提出一种便于利用毛管压力曲线计算储层原始含油饱和度的适用方法     

Low resistivity oil(gas)-bearing reservoir conductive model --Dual water clay matrix conductive model in the north area of Tarim Basin, Xinjiang, China

Shaly sands reservoir is one of the most distributive types of the oil(gas)-bearing reservoirs discovered in China, and low resistivity oil(gas)-bearing reservoirs are mostly shaly sands reservoirs. Therefore, shaly sands reservoir conductive model is the key to evaluate low resistivity oil(gas)-bearing reservoirs using logging information. Some defects were found when we studied the clay distribution type conductive model, dual-water conductive model, conductive rock matrix model, etc. Some models could not distinguish the conductive path and nature of microporosity water and clay water and some models did not consider the clay distribution type and the mount of clay volume. So, we utilize the merits,overcome the defects of the above models, and put forward a new shaly sands conductive model-dual water clay matrix conductive model (DWCMCM) in which dual water is the free water and the microporosity water in shaly sands and the clay matrix(wet clay) is the clay grain containing water. DWCMCM is presented here, the advantages of which can tell the nature and conductive path from different water (microporosity water and freewater), in consid-eration of the clay distribution type and the mount of clay volume in shaly sands. So, the results of logging interpretation in the oil(gas)-bearing reservoirs in the north of Tarim Basin area, China with DWCMCM are better than those interpreted by the above models.     

测井解释中岩性成份的最优化变尺度法分析

测井解释中岩性成份的分析是一个多参数的非线性反演问题，最优化变尺度法比较适合求解这一类问题，而且收敛速度快、效果好。这里主要讨论如何利用最优化变尺度法进行测井资料的岩性解释。首先介绍了最优化变尺度法的原理及其实现步骤，然后论述了最优化变尺度法在测井解释中的应用，包括目标函数的构制、岩性成份分析模型的建立，最后给出了最优化变尺度法在某井段岩性解释中的应用效果。