Case Studies of Tight-Gas Carbonate Reservoir Stimulation: Acid Fracturing vs. Propped Fracturing

2006 ◽  
Author(s):  
Xianwen Li ◽  
Zhenfeng Zhao ◽  
Xu Ma ◽  
Xiaoduo Wang ◽  
Huanshun Zhou
Keyword(s):  
Case Studies ◽  
Carbonate Reservoir ◽  
Tight Gas ◽  
Acid Fracturing ◽  
Reservoir Stimulation

scholarly journals An innovative concept on deep carbonate reservoir stimulation: Three-dimensional acid fracturing technology

2020 ◽  
Vol 7 (5) ◽  
pp. 484-497
Author(s):  
Jianchun Guo ◽  
Bo Gou ◽  
Nan Qin ◽  
Junsheng Zhao ◽  
Lin Wu ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Carbonate Reservoir ◽  
Acid Fracturing ◽  
Reservoir Stimulation ◽  
Innovative Concept

scholarly journals Feasibility study on application of volume acid fracturing technology to tight gas carbonate reservoir development

Petroleum ◽  
2015 ◽  
Vol 1 (3) ◽  
pp. 206-216 ◽  
Author(s):  
Nianyin Li ◽  
Jinxin Dai ◽  
Chao Liu ◽  
Pingli Liu ◽  
Yanming Zhang ◽  
...  
Keyword(s):  
Feasibility Study ◽  
Carbonate Reservoir ◽  
Tight Gas ◽  
Acid Fracturing ◽  
Reservoir Development

Integrated 3D Acid Fracturing Model for Carbonate Reservoir Stimulation

2013 ◽  
Author(s):  
Xi Wu ◽  
Alfred Daniel Hill ◽  
Cassandra Oeth ◽  
Ding Zhu ◽  
Eduardo Gildin
Keyword(s):  
Carbonate Reservoir ◽  
Acid Fracturing ◽  
Reservoir Stimulation

Crosswell Seismic Applications in Tight Gas- Case Studies

2011 ◽  
Author(s):  
Ajay Nalonnil ◽  
Bruce P. Marion ◽  
Sanjeev Dogra
Keyword(s):  
Case Studies ◽  
Tight Gas ◽  
Seismic Applications

scholarly journals Development of machine learning predictive models for history matching tight gas carbonate reservoir production profiles

2018 ◽  
Vol 15 (5) ◽  
pp. 2235-2251 ◽  
Author(s):  
Eric Thompson Brantson ◽  
Binshan Ju ◽  
Busayo Oreoluwa Omisore ◽  
Dan Wu ◽  
Aphu Elvis Selase ◽  
...  
Keyword(s):  
Machine Learning ◽  
Predictive Models ◽  
History Matching ◽  
Carbonate Reservoir ◽  
Tight Gas

Using Advance Acid Fracturing Design to Increase the Production Efficiency in a HPHT Reservoir: A Success Story from Southern Mexico

2021 ◽  
Author(s):  
Frank Figueroa ◽  
Gustavo Mejías ◽  
José Frías ◽  
Bonifacio Brito ◽  
Diana Velázquez ◽  
...  
Keyword(s):  
High Temperature ◽  
Laboratory Tests ◽  
Reaction Rates ◽  
Gas Production ◽  
Carbonate Reservoir ◽  
Fluid Distribution ◽  
Acid Etching ◽  
Southern Mexico ◽  
Acid Fracturing ◽  
Fluid Systems

Abstract Enhanced hydrocarbon production in a high-pressure/high-temperature (HP/HT) carbonate reservoir, involves generating highly conductive channels using efficient diversion techniques and custom-designed acid-based fluid systems. Advanced stimulation design includes injection of different reactive fluids, which involves challenges associated with controlling fluid leak-off, implementing optimal diversion techniques, controlling acid reaction rates to withstand high-temperature conditions, and designing appropriate pumping schedules to increase well productivity and sustainability of its production through efficient acid etching and uniform fluid distribution in the pay zone. Laboratory tests such as rock mineralogy, acid etching on core samples and solubility tests on formation cuttings were performed to confirm rock dissolving capability, and to identify stimulation fluids that could generate optimal fracture lengths and maximus etching in the zone of interest while corrosion test was run to ensure corrosion control at HT conditions. After analyzing laboratory tests results, acid fluid systems were selected together with a self-crosslinking acid system for its diversion properties. In addition, customized pumping schedule was constructed using acid fracturing and diverting simulators and based on optimal conductivity/productivity results fluid stages number and sequence, flow rates and acid volumes were selected. The engineered acid treatment generated a network of conductive fractures that resulted in a significant improvement over initial production rate. Diverting agent efficiency was observed during pumping treatment by a 1,300 psi increase in surface pressures when the diverting agent entered the formation. Oil production increased from 648.7 to 3105.89 BPD, and gas production increased from 4.9 to 26.92 MMSCFD. This success results demonstrates that engineering design coupled with laboratory tailor fluids designs, integrated with a flawless execution, are the key to a successful stimulation. This paper describes the details of acidizing technique, treatment design and lessons learned during execution and results.

Extending Well Productive Life with Acid Re-fracturing in a High Pressure/High Temperature Tight Gas/Condensate Carbonate Reservoir

2011 ◽  
Author(s):  
Mir Md. Rezaul Kabir ◽  
Qasem M. Dashti ◽  
Jai Ram Singh ◽  
San Prasad Pradhan ◽  
Ikhsan Nugraha ◽  
...  
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Carbonate Reservoir ◽  
Gas Condensate ◽  
Tight Gas ◽  
Productive Life ◽  
High Pressure High Temperature

Acid Fracture Conductivity Behavior of Tahe Carbonate: High Closure Stress, Long-Term Conductivity, and Composite Conductivity

2014 ◽  
Vol 1042 ◽  
pp. 44-51
Author(s):  
Jia Nye Mou ◽  
Mao Tang Yao ◽  
Ke Xiang Zheng
Keyword(s):  
Creep Deformation ◽  
Contact Time ◽  
Carbonate Reservoir ◽  
Fracture Conductivity ◽  
Acid Rock ◽  
Acid Fracturing ◽  
Closure Stress ◽  
Composite Conductivity ◽  
Conductivity Behavior

Acid fracture conductivity is a key parameter in acid fracturing designs and production performance prediction. It depends on the fracture surface etching pattern, rock mechanical properties, and closure stress. The fracture surfaces undergo creep deformation under closure stress during production. Preservation of fracture conductivity becomes a challenge at elevated closure stress. In this paper, we investigated acid fracture conductivity behavior of Tahe deep carbonate reservoir with high closure stress and high temperature. A series of acid fracture conductivity experiment was conducted in a laboratory facility designed to perform acid fracture conductivity. Gelled acid and cross linked acid with different acid-rock contact times were tested for analyzing the effect of acid type and acid-rock contact time on the resulting conductivity. Closure stress up to 100MPa was tested to verify the feasibility of acid fracturing for elevated closure stress. Long-term conductivity up to 7-day was tested to determine the capability of conductivity retaining after creep deformation. Composite conductivity of acid fracture with prop pant was also carried out. The study shows that the fracture retained enough conductivity even under effective closure stress of 70MPa. The gelled acid has a much higher conductivity than the cross linked acid for the same contact time. For the gelled acid, contact time above 60-minute does not lead to conductivity increase. Acid fracture with prop pant has a lower conductivity at low closure stress and a higher conductivity at high closure stress than the acid fracture, which shows composite conductivity is a feasible way to raise conductivity at high closure stress. The long-term conductivity tests show that the acid fracture conductivity decreases fast within the first 48-hour and then levels off. The conductivity keeps stable after 120-hour. An acid fracture conductivity correlation was also developed for this reservoir.

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