关键词: 吐哈盆地, 气藏描述, 沉积, 储层, 含气检测, 储量

Abstract:

Present exploration practice proves that Tertiary shallow g as pool is not a pure structural gas pool, but a composite gas pool in Shanle, T urpan Basin. Some well drillings continually failed previously. Consequently, ga s pool scale and reserve is difficulty defined. This paper makes full use of fol lowing techniques to integrately describe Tertiary shallow gas pool in Shanle, T urpan Basin. The first is stratigraphy and gas zone integrated description techn ique based on geology, well logging and seismic data. The second is structural m odeling building technique based on horizon calibration of multi-well and multi -method and integrated interactive interpretation and tested by tectonic evolut ion analysis. The third is sedimentary modeling building technique combined with  seismic facies, well logging facies and sedimentary facies. The fourth is reser voir inversion technique of high resolution. The fifth is reservoir gas-bearing  prediction technique used by seismic horizon information and AVO, Compark metho d. Structural forms and structural features are accurately defined. The relation  of sedimentary microfacies distribution and reservoir features is made clear. R eservoir types and features and reservoir parameters including porosity, saturat ion, permeability, effective thickness and gas-bearing area are defined. Gas-b earing range and driving types and trap types of gas pool are defined. And gas p ool scale and geological reserve are made sure. These techniques provide scienti fic proofs for gas pool exploitation in Shanle, Turpan Basin, and they provide m ethods and references for gas pool description in other field.

Key words: Turpan basin, Gas pool description, Sedimentation, Reservoir, Gas-bearing detection, Reserve.