吐哈盆地山前构造带构造地应力测井响应特征及其对储集层物性的影响

首先研究了地应力所造成的测井响应特征，提出泥岩电阻率是挤压地应力的灵敏指示计；然后，基于泥岩电阻率对地应力响应灵敏的特性，定性确定地应力在井筒方向上的分布规律，分析地应力对储层一盖层系统的影响，发现优质储层总是分布于高挤压应力背景下相对低应力处，同时，在分析岩心资料、试油资料和测井资料的基础上，确定了泥岩电阻率与邻近砂岩储层品质的关系；最后，从有效地应力角度将挤压应力非均质性和欠压实作用统一起来，指出有效地应力作用是影响储层品质的本质因素。

Characteristics of In-situ Stress Logging Response of Foothill Structural Belt in Tuha Basin and Its Influence on Reservoir Physical Properties

The characteristics of logging response induced by in-situ stress are studied. It is proposed that the shale rock resistivity is the indicator of in-situ stress compression.Based on the character of resistivity sensitively responsed to the in-situ stress, the rule of in-situ stress distributed to the direction of wellbore is quantitatively determined, the influence of in-situ stress on the reservoir-caprock system is analyzed. It is found that the quality reservoirs are always distributed on the location where in-situ stress is relatively lower under the background of high compression. At the same time, on the bases of analyzing the data of cores, formation test and well logging, the relationships between shale rock resistivity and the quality of near sand-rock reservoirs are established. Finally the heterogeneity and undercompaction of the compressed stress are unified. It is pointed out that the effective in-situ stress is the major factor influencing the reservoir quality.