Study On Development Technology Of Low Temperature Low Pressure High Wax Reservoir In Changchunling Oil Field

Changchunling oil field carried out a number of development tests, according to the reservoir features of low temperature, low pressure and high wax content. Based on the test results, comprehensived utilization various exploration and development datas, be directed by theoris of petroleum geology, development geology, petroleum reservoir engineering and reservoir physics, used reservoir performance analysis methods, the paper selected the reasonable development mode of Changchunling oil filed.Combined with crude oil wax precipitation mechanism, and by means of a series of crude oil wax experimentations, this thesis analyzed influencing factors of wax precipitation and dealed with damage of reservoir and effect on productivity caused by wax precipitation. The results indicated that the wax precipitation blocked or reduced the reservoir microscopic pore. So the oil permeability reduced greatly, and this affected oil recovery badly.Used reservoir engineering methods, and combined with the reservoir characteristics and fluid properties of Changchunling oilfiled, this paper evaluated the development effect of thermal recovery including steam soaking, steam flooding, hot-water flooding and combustion flooding. The causes of the poor efficiency on exploitation were analyzed in the article. And it considered that Changchunling oil field development should select formation water heating reinjection to Stratum.Based on the comprehensive evaluation on reservoir,3D geological model of chang109 block, which included the structural model, the porosity model and permeability model, was established using Petrel. Then making use of numerical reservoir simulation to try to match on water drive production historyand furthermore. According to waterflooding dynamic analysis result and in the light of the problems existing in chang109, the paper proved a various of exploitation methods from different well network pattern, well spacing, injection-production ratio and water flooding timing. A number of adjustment plans were made for developing chang109 block. Choosing an optimum plan will guide the development of the whole region.