翻译领域：石油钻探          翻译类别：投标书       翻译语种：英译中

中国石油集团渤海钻探工程有限公司于2008年2月27日正式成立，是中国石油天然气集团公司的全资子公司。公司总部位于天津市经济技术开发区，地处环渤海经济带和京津冀都市圈的交汇点，天津滨海新区的中心位置。2014年8月我公司与其建立合作关系，为其负责翻译资料，每次的翻译都获得客户的好评。

研究区致密油储层长石、石英、方解石共存且含量变化大，即混合骨架值变化大，导致常规单密度法计算的孔隙度精度难以控制。对于研究区矿物成分复杂的致密油储层，为了满足计算的孔隙度相对误差小于8%，现有的许多方法适用性均较差，应该采用能够控制矿物变化方法或不受矿物影响的方法，目前较有效的方法有变骨架值中子-密度交会法。中子、密度测井响应是孔隙流体性质、孔隙度、岩石骨架的综合反映。致密油储层的岩性多变造成骨架参数不是恒定值，孔隙空间也不是完全含水，中子、密度两组方程无法解析求出三个参数。致密油储层包括骨架、泥质和孔隙，而孔隙中不仅有油气，也有地层水。为此，本文基于图3所示的致密油储层岩石体积物理测井模型，利用中子、密度及声波测井来构建如下变骨架计算法的测井响应方程。

Feldspar, quartz and calcite coexist in tight oil reservoir in the study area, with big variation of the content. It means that the mixed matrix value greatly changes, leading to uncontrolled precision of porosity calculation with the conventional single density method. For tight oil reservoir with complicated mineral components in the study area, in order to achieve that the relative error of porosity calculation is less than 8%, a method that controls mineral changes or is not affected by minerals should be used as many of existing methods provide poor applicability. An effective method available is the variable matrix value neutron – density intersection method. Neutron and density logging responses are a comprehensive reflection of the pore’s fluid property, porosity and rock matrix. The changing lithology of tight oil reservoir leads to an inconstant matrix parameter and incomplete aqueous porespace; three parameters cannot be solved with neutron or density equation. Tight oil reservoir includes matrix, shale and pore. However, pore contains not only oil and gas but also formation water. For this reason, the following log response equations of the variable matrix method are obtained based on the rock volume physical logging model for tight oil reservoir as shown in Fig. 3 and by using neutron, density and sonic logging.