Study Of Logging Interpretation Method For Deep Igneous Rock Gas Reservoir In Daqing Xujiaweizi Area

Reservoir in igneous lithology characters has become the focus of exploration targets of complex lithologic reservoir. This paper bases on the advanced study and basic applied subject (explanation of log in complex lithologic rocks)of China National Petroleum Corporation technology and R & D Information Management Department. With the helps of previous research it adopt the method and theory of geology, logging, computer science, petrophysics, basing on normal and new technology of logging. Computer technology as a means of experiments is used to comprehensive core geology, logging, testing, logging, gas and other information. At last, it develops a logging appraisal is suit for deep igneous reservoir and practice. This makes logging igneous gas reservoir evaluation method is firm theory as a theory and the practical side and Act.In this paper, in contrast to respond well logging on the basis of igneous rock formation, analysis of the deep igneous stratigraphy Logging Response of Daqing, sums up the study of igneous rock formation electric log responses, the acoustic response characteristics of radioactive log responses, imaging logging on the structure and tectonic features.Response characteristics of ECS Logging in Daqing deep igneous gas reservoir are analyzed, According to international nomenclature used in the geological rock, the model of igneous rocks to identify lithology and rock framework parameters by ECS logging is established, and the process of recognizing igneous rocks is formed. The result is better contrast to Schlumberger. Basing on changing skeleton value by point change, using neutron-density method calculates porosity. 138 core samples analyzed by point, the average absolute error is 1.5%.In view of the study area some features of deep igneous rock, such as complex lithology, complex facies changes , the complex reservoir, the low porosity and permeability reservoirs, reservoir heterogeneity sense, the absence of a unified air-water interface, log interpretation difficult and so on, using non-homogeneous equation for the general form of saturated conditions, according to the entire diameter cores, the best form of saturation equations is established in the study area. Daqing igneous rock process is formed. Discriminating reservoir fluid nature carried out in-depth studies, a multi-parameter fluid identification chart is established. the corresponding log processing module is used on CifSun 2005 of the platform of log interpretation. 52 wells in the study area by the actual data processing, interpretation and conclusion after 75 spaces in the Layer Test results, the rate is more than 85%. the reliability and usefulness of the method in the study area is good. The method can be applied in other regions to promote the igneous reservoir.