The Character Of Polymer-flooding And Technique Of Development Potential Of Sequent Water-flooding In The Gudao Oilfield

Gudao oil field is developed from 1970s. Polymer-flooding of tertiary oil recovery technology has been used in this oilfield since 1992. At present, the polymer-flooding mode covers more than half of the reservoir area, holding half production of the oilfield. Half production and reserves of the polymer-flooding area has been transferred to water-flooding mode. The major problem present is how to make clear the polymer-flooding characters and the distribution of residual oil after the polymer-flooding period. At the base of polymer-flooding, water-flooding matching EOR technology is well developed. Production enhancement period has been prolonged, and the Recovery ratio has been greatly improved.This article drives the need to develop according to the polymer, embarks actually from the GuDao oil field, synthesis material and so on utilization airtight core hole, oil deposit geology, oil well logging, dynamic monitor, production performance, have analyzed the GuDao oil field polymer displacement of reservoir oil characteristic; The union reservoir construction structural theory has developed rivers reservoir construction structure, the granulated substance body flowing unit division and the distributed rule research, after achievements and so on nuclear magnetic resonance image formation experiment has studied the polymer drives in the plane and the level the remaining oil distribution rule, the reservoir remaining oil microscopic distributed characteristic; Used moves the means which the static state unified, the union digital-analog technology develops the polymer to drive later period the oil deposit to describe, explores and has studied in GuDao oil field particularly following water drive stage level, the level and the plane remaining oil distribution condition, as well as in rhythm thick oil level, level band and so on to remaining oil control action.. Based on these, Using oil deposit technical development polymer following water drive mining rules, the remaining oil distribution characteristic, the following water drive technology policy boundary as well as the following water drive irrigation way optimization techniques, the following water drive and so on project method and oil deposit numerical simulation at the right moment adjust the technology, the following water drive optimization to propose the fluid technology, to prevent the flood water advance to stop up adjust the technology and the technology of polymer relieves the jamming or increases the irrigation, the rhythm thick oil level crown horizontal well tapping latent potentialities technology, the following water drive necessary dynamic monitor technology and so on six necessary adjustment engineering research Forms a set to suit the isolated island oil field note polymer following water drive adjustment necessary technology finally, saw the good effect, to further raise the oil field recovery ratio and GuDao oil field continues the steady progression to provide the important technical support.