关键词: 埋藏压实, 压实成岩裂缝, 砂砾岩, 压实成岩物理模拟, 渤中19-6

Abstract:

Abstract： With the help of core observation, thin section identification, well logging identification, and compaction physical simulation experiments, aiming at the scientific problem of the vertical evolution characteristics of compaction diagenetic fractures in glutenite reservoir, taking the glutenite of Kongdian Formation in Bozhong 19-6 condensate gas field as the anatomical object, comprehensive research was carried out, and the following understandings were obtained: 1）Fractures in the glutenite reservoir of Kongdian Formation in Bozhong 19-6 are generally developed, including inherited fractures and noninherited fractures. Inherited fractures developed earlier and occurred following the original cracks along the clastic particles. Noninherited fractures mainly broke along the feldspar cleavage in the form of conjugate shear fractures. 2）Fractures are more developed in gravel particles than sand particles, and in feldspar particles than quartz particles. The degree of crushed fracture development is proportional to the brittleness index, and inversely proportional to the interstitial content. 3）Three stages of glutenite fracture development zones have been developed vertically during physical modeling, and the second fracture development zone is consistent with the distribution of fractures in the study area, which controls the development of high-quality reservoirs.

Key words: buried compaction, compaction diagenetic fracture, glutenite rock, compaction physical simulation experiments, Bozhong 19-6