Evaluation Studies. Shunan ~ Sichuan In The Transition Zone Jialing River Formation Reservoirs Logging

Recently, with ceaselessly further exploration of gas accumulation in the Jialing River Group of transition between the south and middle of Sichuan, we are facing more and more questions. There are greater difficulties in reservoir's recognition, ascertaining fluid's nature, and responses' characters of reservoir are not obvious, especially, the interpretation of fractured reservoirs has more difficulties, because of expensively distributed reservoirs of Jialing River Group and complicated lithology in this region. Furthermore, the region has not by the numbers been carried on research work on logging analysis, which lead to some well's interpretation lapsus. Qua one of the main means of detecting and appraising the layer of oil and gas in oil and gas exploration in time, with logging information, it is very essential to research and analyze the logging response character of diversified types of reservoirs in Jialing River Group on the aspect of logging interpretive technology, and further establish a suit of reservoir's logging discriminating technologies, calculational methods of reservoirs' parameters and distinguishing methods of fluid types. Therefore, growing on the research work of Jialing River Group will be in favor of instructing the oil and gas explorative work of Jialing River Group's reservoir in this region and other regions.This thesis mainly aiming at diversified types of reservoirs of gas accumulation in the Jialing River Group of transition between the south and middle of Sichuan, systemically collected the information about logging, geologic, testing and oil-testing, analyzed logging responsive characters of reservoirs and the nature of fluid that they contain, and established methods of logging, recognition and analytical evaluation about diversified types of reservoirs. Thus, it makes the base for discovering layer of oil and gas in time, and carrying on appraisement work of resource about oil and gas. At the same time, it may instruct logging interpretative work in the field, and further improve the accordance rate of logging interpretation. The research production may play a role of instructor on the reservoir's logging interpretation of Jialing River Group in other areas in Sichuan.This thesis formed distinguishing criterion and interpretative model of reservoirs in the Jialing River Group of transition between the south and middle of Sichuan, by summarizing well logging responsive characters of diversified lithologic combinations in the Jialing River Group of transition between the south and middle of Sichuan. We aboratively picked distinguishing methods of fluid nature that reservoir contains in the Jialing River Group of transition between the south and middle of Sichuan, consequently, oil and gas is discovered in time or over again and it avoids leaving out reservoirs. The base of logging analytic methods for resource appraisement of oil and gas, and it offered rational and valid opinions for exploration of oil and gas in Jialing River Group. It may instruct logging interpretative work in the field of Jialing River Group, and improve accordance rate of logging interpretation. It provided exact well section of perforation and put forward the accordance oil-testing advices.