Superimposed Compound Karst Model and Oil and Gas Exploration of Carbonate in Tazhong Uplift
Han Jianfa
Sun Chonghao
Wang Zhenyu
Ji Yungang
Li Hao
Chen Jun
Abstract：In the process of large carbonate platform formation and tectonic evolution of Tarim basin, the thick platform margin reef, intra-platform beach and deep dolomite carbonate sediments were developed, which formed the various types and large scale of karst fracture-cave systems by the reconstruction of multi period tectonic movement, and the system is an important field of oil and gas exploration and development inside the platform-basin transitional area marine carbonate.Based on the multidisciplinary static and dynamic comprehensive analysis of the field outcrop, underground geology, geophysical prediction, karst geological description, static characteristics and production dynamic data, this paper described the characteristics of reservoir space development, such as caves, dissolved pores and fractures as well as the formation mechanism of the large-scale karst fracture-cave system, and established the superimposed development model of unconformity exposed and fracture karst, and revealed the horizontal distribution of unconformity related karst and the longitudinal distribution and three-dimensional distribution of the fault karst.The comprehensive study shows that the composite karst fracture-cave system is the key to oil and gas accumulation, and is also the basis for the exploration and development of the complex oil and gas accumulation area.The establishment of the superimposed compound karst model is an effective way to guide the significant discovery and efficient development of the carbonate condensate gas field in Tazhong uplift area.
Keywords：Tazhong upliftcarbonateexposed unconformity surfacefracture zonessuperimposed compound karstCompound hydrocarbon accumulationpetroleum geology
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：11( 410-420 )