Objective Reef reservoirs have recently been receiving more and more attention due to their important role in petroleum exploration.Large-scale reefs have been previously discovered in the Paleozoic strata of western ...Objective Reef reservoirs have recently been receiving more and more attention due to their important role in petroleum exploration.Large-scale reefs have been previously discovered in the Paleozoic strata of western China,suchas the Late Permian of the Sichuan Basin,Late Ordovician of the Ordos Basin,and Late Ordovician of the Tarim Basin,which are all important hydrocarbon reservoirs in these areas.展开更多
The deformation structure of soft sediments has always been a research hotspot,which is of great significance for analyzing the tectonic and sedimentary evolution background of a basin,as well as the physical properti...The deformation structure of soft sediments has always been a research hotspot,which is of great significance for analyzing the tectonic and sedimentary evolution background of a basin,as well as the physical properties of reservoirs.Previous studies have reported that a large number of soft sediment deformation structures are developed in the western part of Liaohe depression.In this study,through core observation and thin section identification,various types of deformation structures are identified in the core samples which are collected from the upper Es4 in the Leijia region,western sag of Liaohe depression,such as liquefied dikes,liquefied breccia,convoluted laminae,annular bedding,synsedimentary faults,vein structures,etc.Based on the characteristics of core structure,single well profile and continuous well profile,combined with the regional background,this study clarifies that the deformation structure of soft sediments in the study area is mainly caused by seismic action.It is found that the permeability and porosity of deformation layers in the study area are higher than those of the undeformation layers,which proves that the deformation structure of soft sediments has a good effect on improving the physical properties of reservoirs.展开更多
Objective Bitumen is generally associated with oil and gas, which was originally used as an indicator of hydrocarbon reservoirs. With the progress of organic geochemical measuring and testing techniques, bitumen, esp...Objective Bitumen is generally associated with oil and gas, which was originally used as an indicator of hydrocarbon reservoirs. With the progress of organic geochemical measuring and testing techniques, bitumen, especially solid bitumen sampled from reservoirs, has been proved to be closely related to the evolution of hydrocarbon reservoirs. The Sinian cores collected from the Anyue gas field contain abundant pores, vugs and fractures, which are filled with a mass of solid bitumen of two epochs and dolomite in between. This work focused on the characteristics of different generations of bitumen and the genesis, in an effort to better understand the process of the Sinian gas accumulation in the Anyue gas field.展开更多
基金funded by the National Natural Science Foundation of China (grants No.41272159 and 41572099)China Geological Survey (grant No.1212011120964)
文摘Objective Reef reservoirs have recently been receiving more and more attention due to their important role in petroleum exploration.Large-scale reefs have been previously discovered in the Paleozoic strata of western China,suchas the Late Permian of the Sichuan Basin,Late Ordovician of the Ordos Basin,and Late Ordovician of the Tarim Basin,which are all important hydrocarbon reservoirs in these areas.
基金funded by the National Natural Science Foundation“Event Sedimentation in Lacustrine Organic-Rich Mudrock:Taking the Chang 7-8 Member of the Ordos Basin as an Example”(Grant No.41802130).
文摘The deformation structure of soft sediments has always been a research hotspot,which is of great significance for analyzing the tectonic and sedimentary evolution background of a basin,as well as the physical properties of reservoirs.Previous studies have reported that a large number of soft sediment deformation structures are developed in the western part of Liaohe depression.In this study,through core observation and thin section identification,various types of deformation structures are identified in the core samples which are collected from the upper Es4 in the Leijia region,western sag of Liaohe depression,such as liquefied dikes,liquefied breccia,convoluted laminae,annular bedding,synsedimentary faults,vein structures,etc.Based on the characteristics of core structure,single well profile and continuous well profile,combined with the regional background,this study clarifies that the deformation structure of soft sediments in the study area is mainly caused by seismic action.It is found that the permeability and porosity of deformation layers in the study area are higher than those of the undeformation layers,which proves that the deformation structure of soft sediments has a good effect on improving the physical properties of reservoirs.
基金supported by the National Natural Science Foundation of China(grant No.41572133)National Key Basic Research and Development Project (grant No.2012CB214805)
文摘Objective Bitumen is generally associated with oil and gas, which was originally used as an indicator of hydrocarbon reservoirs. With the progress of organic geochemical measuring and testing techniques, bitumen, especially solid bitumen sampled from reservoirs, has been proved to be closely related to the evolution of hydrocarbon reservoirs. The Sinian cores collected from the Anyue gas field contain abundant pores, vugs and fractures, which are filled with a mass of solid bitumen of two epochs and dolomite in between. This work focused on the characteristics of different generations of bitumen and the genesis, in an effort to better understand the process of the Sinian gas accumulation in the Anyue gas field.
