The Fluid Identification Of The Conglomerate In Baikouquan Formation In Mahu Depression

The reservation of oil and gas in Mahu depression area is abundant,which is mainly distributed in the low permeable conglomerate reservoir.Comparing with other type of fragmental rocks,it has a various grain sizes(with a character of multimodal distribution of grains),poor sorting characters,complex and changeable pore structure,the low compatibility of fluid identification and evaluation in convention reservoir.The characteristics of the conglomerate reservoir have caused the unique difficulties in logging evaluation.The characteristics of low porosity and low permeability are the most important factors in the evaluation of the oil saturation of the conventional reservoir fluids.The conventional logging evaluation is mainly due to the large technical difficulty,the application of logging data to identify the fluid type and the saturation of the calculation method encountered challenges,the establishment of the application of nuclear magnetic resonance logging in the conglomerate reservoir method to accurately calculate the saturation and fluid identification.In the thesis,the logging evaluation of the low permeability conglomerate in the Baikouquan Formation of the Mahu Depression in the Junggar Basin was studied.First,the theory and method of the application of the low permeability conglomerate magnetic resonance logging were expanded.A Method for Evaluating the Oil-bearing Properties of Low Permeability Conglomerate was studied.The thesis provides an important technical support for the exploration and development of low permeability conglomerate,and improves the accuracy of oily evaluation in the area of Mahu depression.