Increasing Working Gas Volume of UGS Based on Low Permeability Lithological Gas Reservoirs

Abstract

Objectives/Scope A low-permeability lithological reservoir was successfully put into operation in 2015 as a gas storage system. The field S2 Underground Gas Storage (UGS) is located in the Ordos Basin and is primarily alithological trap, with low permeability, high heterogeneity, and no obvious seal boundaries. Based on low permeability, low abundance, low vertical wells productivity, low pressure coefficient, serious skin damage in the bottomhole during drilling and completion, strong heterogeneity and unclear lithological boundaries, low control of injection-withdrawal well patterns, the working gas volume and operating efficiency of S2 UGS underperformed relative to modeled expectations. The technical solutions to improve the working gas volume of S2 USG focused upon: well pattern optimization, well placement, stimulation treatment, infillings, and increasing of operating maximum pressure. The results demonstrate that if reasonable technical solutions are adopted, even poor and low-quality storage reservoirs with low permeability, and strong heterogeneity, can be utilized as natural gas storage targets. This discussion provides an overview of approaches used in the Ordos Basin to make operation of S2 UGS more efficient. The development of this project, particularly regarding the operation processes and the resulting adjustments, are noteworthy. The development of such UGS reservoirs require new insights into the performance criteria which can be applied to other reservoirs in the future.

Current Status and Prospects of Carbon Capture, Utilization and Storage Technology in the Context of International Carbon Neutrality Strategic Goals

“…The carbon emission industries suitable for CCUS in China mainly include thermal power plants, cement, steel, coal chemical industry, etc. [6].…”

“…Pre-combustion capture technologies include integrated gasification combined cycle power generation (IGCC) and industrial separation. IGCC is a technology that gasifies fuels such as coal, biomass, and petroleum coke, and uses the purified gas for gas-steam combined cycle power generation.Industrial separation refers to CO2 separation in industries such as coal to oil, coal to gas, natural gas processing, cement, methanol, and fertilizer [6]. Currently, most carbon capture technologies in China's CCUS projects are industrial separation technologies.…”

“…This carbon capture process is currently recognized as the most economical and highly purified gas purification technology at home and abroad. The purity of CO2 captured by the extended petroleum low-temperature methanol process can reach 99% [6].…”

Current Status and Prospects of Carbon Capture, Utilization and Storage Technology in the Context of International Carbon Neutrality Strategic Goals

“…The carbon emission industries suitable for CCUS in China mainly include thermal power plants, cement, steel, coal chemical industry, etc. [6].…”

“…Pre-combustion capture technologies include integrated gasification combined cycle power generation (IGCC) and industrial separation. IGCC is a technology that gasifies fuels such as coal, biomass, and petroleum coke, and uses the purified gas for gas-steam combined cycle power generation.Industrial separation refers to CO2 separation in industries such as coal to oil, coal to gas, natural gas processing, cement, methanol, and fertilizer [6]. Currently, most carbon capture technologies in China's CCUS projects are industrial separation technologies.…”

“…This carbon capture process is currently recognized as the most economical and highly purified gas purification technology at home and abroad. The purity of CO2 captured by the extended petroleum low-temperature methanol process can reach 99% [6].…”

Microcapsule preparation process research and current status of oilfield application

“…In the context of oilfield development, the utilization of chemical reagents is indispensable [5]. To mitigate the loss of key chemical reagents near the wellbore and to enable oilfield chemical additives to function effectively deep within the reser-voir, scholars have endeavoured to microencapsulate chemical reagents for oilfield development.…”

Current Status and Prospects of Carbon Capture, Utilization and Storage Technology in the Context of International Carbon Neutrality Strategic Goals

“…The carbon emission industries suitable for CCUS in China mainly include thermal power plants, cement, steel, coal chemical industry, etc. [6].…”

“…Pre-combustion capture technologies include integrated gasification combined cycle power generation (IGCC) and industrial separation. IGCC is a technology that gasifies fuels such as coal, biomass, and petroleum coke, and uses the purified gas for gas-steam combined cycle power generation.Industrial separation refers to CO2 separation in industries such as coal to oil, coal to gas, natural gas processing, cement, methanol, and fertilizer [6]. Currently, most carbon capture technologies in China's CCUS projects are industrial separation technologies.…”

“…This carbon capture process is currently recognized as the most economical and highly purified gas purification technology at home and abroad. The purity of CO2 captured by the extended petroleum low-temperature methanol process can reach 99% [6].…”

Microcapsule preparation process research and current status of oilfield application

“…In the context of oilfield development, the utilization of chemical reagents is indispensable [5]. To mitigate the loss of key chemical reagents near the wellbore and to enable oilfield chemical additives to function effectively deep within the reser-voir, scholars have endeavoured to microencapsulate chemical reagents for oilfield development.…”

Current Status and Prospects of Carbon Capture, Utilization and Storage Technology in the Context of International Carbon Neutrality Strategic Goals

“…The carbon emission industries suitable for CCUS in China mainly include thermal power plants, cement, steel, coal chemical industry, etc. [6].…”

“…Pre-combustion capture technologies include integrated gasification combined cycle power generation (IGCC) and industrial separation. IGCC is a technology that gasifies fuels such as coal, biomass, and petroleum coke, and uses the purified gas for gas-steam combined cycle power generation.Industrial separation refers to CO2 separation in industries such as coal to oil, coal to gas, natural gas processing, cement, methanol, and fertilizer [6]. Currently, most carbon capture technologies in China's CCUS projects are industrial separation technologies.…”

“…This carbon capture process is currently recognized as the most economical and highly purified gas purification technology at home and abroad. The purity of CO2 captured by the extended petroleum low-temperature methanol process can reach 99% [6].…”

Microcapsule preparation process research and current status of oilfield application

“…In the context of oilfield development, the utilization of chemical reagents is indispensable [5]. To mitigate the loss of key chemical reagents near the wellbore and to enable oilfield chemical additives to function effectively deep within the reser-voir, scholars have endeavoured to microencapsulate chemical reagents for oilfield development.…”