Study On The Sebei Gas Field Logging Technology And Interpretation Method Of Water Flooded Layer Identification

Sebei gas field is the gas field of Qaidam basin, are mainly composed of Sebei-1gasfield, Sebei-2gas field and Tainan gas field. China is currently the largest authigenic foundQuaternary shallow biogenic gas reservoir, in which gas reservoir, buried shallow, loosesandstone reservoir, sand production, long gas section, gas layers and thin, weak edge waterelastic gas drive, the characteristics of distribution of gas and water complex.How to ascertain the water layer and water is to take the water shutoff, and then"prerequisite link precipitation gas". Logging method as well the water layer and one of themost widely used method of water. Through the investigation of the technology for water,widely used at home and abroad for many parameters of production profile combinationlogging analysis and to identify small layer of water production. From the birth of multipleparameters of domestic and foreign gas logging application situation, the method for the largewater yield of well can accurately determine the water layer and the volume of water flow.But when the gas content is small, underground fluid, accompanied by sanding, considerabledifficulties, there is recognition therefore, need further research on other wells for waterlogging technology and interpretation methods, improve the water layer recognition ability,quantitative calculation of the water, provide the data basis for gas well production andeffective measures.The project objective: according to the distribution of gas and water in Sebei gas fieldcomplex, small water outlet has the characteristics of different types, combined with thegeological and production dynamic data, study the nature and quantity of reservoir producedfluid in the wellbore, and phase state and distribution, accurate identification of undergroundwellbore conditions and output.The project research object: through the optimization of production logging technology,can be targeted to improve production logging on the output layer of distinguishing ability;through the application of well logging in the Sebei gas field and the interpretation method oflogging data in the research field of dynamic north acerbity of detailed analysis, the logging for Sebei gas field geological interpretation method thus, a dynamic monitoring andproduction development to guide the Sebei gas field.Through the implementation of this project will enable the Sebei gas field loggingtechnology process has been optimized, the logging data interpretation precision is largelyimproved, so that the field developers can each layer of water situation directly to gasreservoir, development and water plugging plan reasonable, effective eor. Have a definiteobject in view to tapping the potential synergies, increase gas water control, so as to realizethe sustainable development of gas reservoir.