scholarly journals Research on optimization design method of horizontal well of volcanic gas reservoir in Daqing Xushen deep natural gas field

2020 ◽  
Vol 510 ◽  
pp. 022014
Author(s):  
Zhonglin
Keyword(s):  
Natural Gas ◽  
Optimization Design ◽  
Horizontal Well ◽  
Design Method ◽  
Volcanic Gas ◽  
Gas Reservoir ◽  
Gas Field

A Case Study for the First Successful Refracturing on Horizontal Well in Tight Volcanic Gas Reservoir in China

2019 ◽  
Author(s):  
Wenjun Wang ◽  
Hongyan Guo ◽  
Youquan Huang ◽  
Ying Yu ◽  
Donggang Li ◽  
...  
Keyword(s):  
Horizontal Well ◽  
Volcanic Gas ◽  
Gas Reservoir

The Feasibility Analysis of an Underground Natural Gas Storage Using a Depleted Offshore Gasfield

2021 ◽  
Author(s):  
Hongbo Huo ◽  
Jinman Li ◽  
Zhong Li ◽  
Xiaocheng Zhang ◽  
Shiming He ◽  
...  
Keyword(s):  
Natural Gas ◽  
Gas Storage ◽  
Feasibility Analysis ◽  
Bohai Bay ◽  
Gas Reservoir ◽  
Gas Field ◽  
Offshore Engineering ◽  
Well Pattern ◽  
The Impact ◽  
Depleted Gas Reservoir

Abstract Objectives/Scope Compared with the underground nature gas storage (UNGS) onshore, the offshore UNGS is further from residential areas and industrial areas, which can shave the peak of natural gas more safely. However, the investment of offshore engineering is higher. Offshore UNGS with reusing offshore depleted gas reservoir construction can not only solves the problems of offshore engineering structure and wells abandonment but also greatly reduces the investment. Methods, Procedures, Process According to the experience of UNGS onshore, the following factors were considered: reservoir buried depth, working gas volume, distance from land, etc. Based on one depleted gasfield in Bohai Bay, the feasibility analysis of an UNGS was carried out, the impact of the offshore UNGS on the environment, the sealing of the underground gas trap and the integrity of the wellbore were evaluated, and the result proves that the sealing of the underground gas trap of the gas field was good. The natural gas pipeline network subsea can provide transportation for the UNGS and compatible to be transformed into the offshore UNGS. However, for one thing, the poor wellbore integrity conditions and imperfect well pattern constraint the reusing, for another, the capacity of offshore facilities need to be improved. Results, Observations, Conclusions According to the economic evaluation, the investment of offshore depleted gas reservoir reusing as UNGS can be reduced by 56% compared with the construction of a new onshore UNGS, and 32% compared with the offshore gas field abandon. A new idea is provided for peak shaving of natural gas, greatly reducing the investment in gas storage construction. Experience has been accumulated by the feasibility analysis of offshore depleted gas field UNGS and that has a bright future. Novel/Additive Information The limitation of natural conditions on project construction, contingency plans for force majeure such as sea ice, storm and earthquake, etc are necessary to be considered, and its implementation still needs the support of the government and relevant non-governmental organizations

A Design Method of Supersonic Separator Used in Natural Gas Liquefaction Process

2012 ◽  
Vol 608-609 ◽  
pp. 1309-1313
Author(s):  
Zeng Cai Li ◽  
Heng Sun ◽  
Bao Ling Guo ◽  
Feng Liu
Keyword(s):  
Low Temperature ◽  
Natural Gas ◽  
Laval Nozzle ◽  
Design Method ◽  
Straight Segment ◽  
Gas Field ◽  
Natural Gas Liquefaction ◽  
Liquefaction Process ◽  
Liquefaction Plant ◽  
Supersonic Separator

It is feasible to obtain low temperature that can liquefy the natural gas using supersonic separator in a liquefaction process. This paper represented a design method of the supersonic separator used in natural gas liquefaction plant, including the design of the Laval nozzle, the design of the rectifier straight segment and the design of the diffuser segment. The size of each part and the appropriate shape can be gotten by the theoretical calculation. The design results of an experiment liquefaction device using supersonic separator is given. The work is helpful for the natural gas transportation in remote and low production gas field.

scholarly journals Phase Behavior Identification and Formation Mechanisms of the BZ19-6 Condensate Gas Reservoir in the Deep Bozhong Sag, Bohai Bay Basin, Eastern China

Geofluids ◽  
2021 ◽  
Vol 2021 ◽  
pp. 1-19
Author(s):  
Zhenliang Wang ◽  
Shengdong Xiao ◽  
Feilong Wang ◽  
Guomin Tang ◽  
Liwen Zhu ◽  
...  
Keyword(s):  
Critical Temperature ◽  
Natural Gas ◽  
Phase Behavior ◽  
Oil And Gas ◽  
Eastern China ◽  
Bohai Bay ◽  
Bohai Bay Basin ◽  
Gas Reservoir ◽  
Gas Field ◽  
Gaseous Hydrocarbons

Significant developments have been observed in recent years, in the field of deep part exploration in the Bozhong Sag, Bohai Bay Basin in eastern China. The BZ19-6 large condensate gas field, the largest gas field in the Bohai Bay Basin, was discovered for the first time in a typical oil-type basin. The proven oil and gas geological reserves in the deeply buried hills of the Archean metamorphic rocks, amount to approximately 3 × 10 8 tons of oil equivalent. However, the phase behavior and genetic mechanisms of hydrocarbon fluids are still unclear. In this study, the phase diagram identification method and various empirical statistical methods, such as the block diagram method, φ 1 parameter method, rank number method, and Z -factor method were implemented to comprehensively identify the phase behavior types of the BZ19-6 condensate gas reservoir. The genetic mechanism of the BZ19-6 condensate gas reservoir was investigated in detail through analyses of physical properties of the fluid at high temperatures and pressures, organic geochemical characteristics of condensate oil and gas, and regional tectonic background. Consequently, this study is shown as follows: (1) The BZ19-6 condensate gas reservoir is a part of a secondary condensate gas reservoir with oil rings, formed synthetically since the Neogene period due to multiple factors, such as retrograde evaporation from deep burial and high temperature, inorganic CO2 charging from the deep mantle, and late natural gas invasion. (2) The hydrocarbon accumulation process of the BZ19-6 condensate gas reservoir is as follows: First, a large amount of oil is accumulated at the end of the lower Minghuazhen deposition (5 Ma BP); second, a large amount of natural gas is generated in the deep-source kitchen and mantle-derived inorganic CO2 charged into the early formed oil reservoirs at the end of the upper Minghuazhen deposition (2 Ma BP). As a result, the content of gaseous hydrocarbons in the hydrocarbon system of the reservoir increased, which led to large amounts of liquid hydrocarbons dissolved in gaseous hydrocarbons and significantly reduced the critical temperature of the hydrocarbon system. Therefore, existing secondary condensate gas reservoirs are formed when the critical temperature is lower than the formation temperature and it enters the critical condensate temperature range.

Feasibility Study on Technology Named Liquid Explosive Applied in Volume Fracturing Transformation of Shale Gas Reservoir

2012 ◽  
Vol 538-541 ◽  
pp. 2281-2284
Author(s):  
Jin Jun Wu ◽  
Li Cai Liu
Keyword(s):  
Feasibility Study ◽  
Shale Gas ◽  
Optimization Design ◽  
Design Method ◽  
High Energy ◽  
Liquid Explosive ◽  
Gas Reservoir ◽  
Reservoir Characteristics ◽  
Shale Gas Reservoir ◽  
Volume Fracturing

According to Chinese shale gas reservoir characteristics and its exploitation situation, based on principle of high energy gas fracturing, combined with theory on volume transformation technology of shale gas reservoir, the feasibility study of liquid explosive technology applied in volume fracturing transformation of shale gas reservoir is precede. Through analyzing action mechanism of liquid explosive technology, studying forming mechanism about multi-crack system produced in shale gas reservoir, and analyzing shale gas reservoir characteristics and drilling and completion technologies, etc., proving the feasibility of technological principle and process design about liquid explosive technology applied in volume transformation of shale gas reservoir, meanwhile, proposing the design adopts the technology combined hydraulic fracturing and liquid explosive together. Also advising to establish theoretical model and optimization design method through series of studying and experiments, and to do field test application, so as to provide a new technology way for its exploration and exploitation.

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