Study On The Interpretation Model Of Production Test Data For Horizontal Wells

In the mid-late stage of oilfield development,we are confronted with the problems of rapid rising in oil moisture content and decline in production.The high water cut of horizontal well is increasingly serious.It is urgent to carry out production logging to get dynamic datas of horizontal wells,by analyzing which can we find out the position of water exit and take comprehensive measures to control.Therefore,future research on production logging interpretation is necessary.Research on the model of production logging interpretation,of which the purpose is obtaining formation parameter effectively,reasonably evaluating the deliverability of reservoir and enhancing production and recovery efficiency of single well,is aiming at raising the management level of oil wells and increasing economic benefits.The deviation angle of horizontal wells,complex flow pattern and instrument drift in the wellbore give rise to difficulty at logging interpretation.Hence,researching the model has great significance for water control and increasing production.At present,there are nearly 200 horizontal Wells in huabei oilfield,all of which are mechanical Wells.After solving the problem of dynamic test of horizontal well production of horizontal well,the production data of horizontal well of horizontal well of the machine was studied.In this paper,the author investigated the research status of production logging interpretation at home and abroad,took theoretical derivation based on the multiphase flow theory at Stanford university,and analyzed downhole flow pattern of horizontal well.The response and parameter correction of logging instrument are discussed in addition.Furthermore,contacting with the actual production of Huabei Oilfield,laboratory experiments are designed based on the situation-oil moisture content is high and production is quite the contrary.As a result,we gain the model of production logging interpretation which is suitable to the actual production of Huabei Oilfield.In the petroleum huabei oilfield high water cut,the generally low for laminar flow,laminar flow occurs when the output is more than 50 m3 / d-smooth and turbulent flow regime,but because of the influence of well bore structure,there is a hill streams,downhill flow and turbulent flow.The experimental results show that the Angle of well inclination has great influence on the holdup measurement results.Combined with the above characteristics of horizontal well and the situation of oil well high water cut,huabei oilfield,based on the principle of conservation of momentum and Stanford university multiphase pipe flow theory,establish oil-water two phase(containing dissolved gas)interpretation model.