苏里格气田苏5区块盒8段气藏录井解释与评价

鄂尔多斯盆地苏里格气田苏5区块上古生界下石盒子组盒8段气藏主要受辫状河心滩、边滩微相砂岩展布和储集岩物性的控制。主力产层段纵向分布规律不明显，横向非均质性强，流体性质及产能变化大，为典型低孔、低压、低产岩性气藏，在地层流体评价特别是流体性质判断方面给测井、录井解释工作带来了一定难度。针对这一情况，综合分析该区的录井、测井、分析化验及测试资料特征并充分利用气测录井资料，总结出适合该区实际情况的解释方法及图版，并据其对流体性质进行了识别。通过在苏5-6-19等井的实例验证，说明所总结的方法具有实用性。

LOGGING INTERPRETATION AND EVALUATION OF GAS RESERVOIRS AT HE-8 MEMBER (P1x8) IN BLOCK SU-5 OF SULIGE GAS FIELD

Distribution of sandstones of braided river channel bar and point bar microfacies and physical properties of reservoirs are the main factors controlling the gas pools in P1x8 in the Block Su 5 of Sulige gas field, the Ordos Basin. The vertical distribution of main pay zones has no significant regularity, the lateral heterogeneity of the reservoirs is strong, and the variations of fluid properties and productivity are large, thus the gas pools belong to lithologic gas reservoirs with low porosity, low pressure and low productivity. Logging interpretation is very difficult in respect of formation fluid evaluation, especially discrimination of fluid properties. Based on comprehensive analyses of the logging, laboratory testing and well testing data and in combination with mud logging data, interpretation methods and chart boards adaptable to the real situations of the study area are developed and used to recognize fluid properties. Field application in wells such as Su 5-6-19 shows that they are practical.