PH Sensitive Polymers for Improving Reservoir Sweep and Conformance Control in Chemical Flooding, (Final).

Mukul, S. ; Steven, B. ; Chun, H.

Technical Information Center Oak Ridge Tennessee

关键词: Reservoir engineering;    Enhanced recovery;    Polymers;    Petroleum engineering;    Citric acid;   

RP-ID  :  DE2008941104

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

There is an increasing opportunity to recover bypassed oil from depleted, mature oilfields in the US. The recovery factor in many reservoirs is low due to inefficient displacement of the oil by injected fluids (typically water). The use of chemical flooding methods to increase recovery efficiencies is severely constrained by the inability of the injected chemicals to contact the bypassed oil. Low sweep efficiencies are the primary cause of low oil recoveries observed in the field in chemical flooding operations even when lab studies indicate high oil recovery efficiency. Any technology that increases the ability of chemical flooding agents to better contact the remaining oil and reduce the amount of water produced in conjunction with the produced oil will have a significant impact on the cost of producing oil domestically in the US. This translates directly into additional economically recoverable reserves, which extends the economic lives of marginal and mature wells. The objective of this research project was to develop a low-cost, pH-triggered polymer for use in IOR processes to improve reservoir sweep efficiency and reservoir conformance in chemical flooding.