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New Method of Gas and Water Layer Identification of Low Permeability Carbonate Gas Reservoir

2021; Springer Nature; Linguagem: Inglês

10.1007/978-981-16-0761-5_200

1866-8763

Yue-hua Cui, Yifei Lan, Huihui Liu, Jincheng Wang, Xiao-ling Meng, Zhun-bei Wang,

Oil and Gas Production Techniques

The relationship between natural gas and formation water in the low permeability carbonate gas reservoir of mawu_(1 + 2) formation in the certain area of Jingbian gas field is complex, most gas wells are water producing, the single well productivity is low, the water gas ratio is generally high, the effective identification of gas and water layers is very difficult, they all restrict the effective development of gas fields.In order to improve the accuracy of gas and water layer identification, on the basis of previous studies, fully combined with the latest achievements in the research area, The relationship among well logging interpretation, gas testing effect and production performance has been analyzed in depth, according to the characteristics of gas testing and production performance of reservoirs with different fluid properties, the dynamic identification standard of gas and water layers in mawu_(1 + 2) gas reservoirwhich realizes the rapid and accurate identification of gas and water layers has been established;According to the dynamic identification standard of mawu_(1 + 2) gas reservoir in the certain area of Jingbian gas field, a number of reservoirs with different fluid properties have been selected,the crossplot analysis has been carried out by using logging parameters such as acoustic time difference and resistivity, shale content and density, and the early logging identification chart in the study area has been modified; At the same time, the deep and shallow bilateral resistivity, gas saturation, wave impedance and other parameters are used to identify the gas and water layers, They also enrich the identification methods of gas and water layers of the research area; The well logging identification method of gas and water layers in the study area has been comprehensively considered, and the multi parameters have been analyzed in coordination,the gas and water layer identification standard of mawu_(1 + 2) gas reservoir in the certain area of Jingbian gas field has been innovated based on the production performance, and the overall compliance rate of the recognition standard is 92.4%.The gas water distribution characteristics in the certain area of Jingbian gas field have been predicted by this technology, and the well location deployment and gas testing horizon optimization have been guided efficiently. At the same time, it has reference significance for the research of gas water distribution in carbonate gas reservoirs at home and abroad.