Thick Oil Reservoir Water Drive Large-scale Exploration In This Area The Development Effects

The distribution area of Lamadian oilfield is mainly thick oil reservoir,of which 67.5% of the reservoirs are in the thick oil reservoir which is greater than or equal to 2 meters.According to research found the extra high water cut period,thick oil reservoirs are heterogeneous,the mining efficiency is very low,at the same time when the injection of about 1/3 thick layers are unable to complete washing or washing effect is very weak.Because of these properties of thick oil layer,the average value of exploitation can only reach 33%.Up to now,the exploitation time of thick oil layer has been up to 44 years.The development of mining technology has gone through the following 6 stages.Well network density for each numerical mining port 62.84 square kilometers,300 meters away from the wells numerical water flooding each layer,well spacing density and spacing mismatch between wells can not effectively control height of layer structure unit.Therefore,a large amount of remaining oil is accumulated in some areas that have not been improved.In order to solve the above problems,according to the current situation combining with the characteristics of the oil well network,research on characteristics of residual oil and distribution;consider whether the extra high water cut period wells tapping conditions have encryption and making the operation plan,to the rest of the configuration adjustment measures to guide the further excavation of remaining oil flooding diving work.In this paper,the results of the following studies were conducted.1.the analysis of the status quo and the characteristics of the development of well logging network in the development of the current situation and the development of the oil field research and discussion.2.reasonable utilization of data,is mainly about the new wells water flooded layer interpretation,a coring and sidewall coring,coring drilling technology and data aided through numerical simulation experiments,to investigate the characteristics of residual oil in the reservoir and summarize the distribution.3.the basic characteristics of the reservoir as a starting point,based on modern sedimentology theory,the outcrop relevant information for reference,to model prediction and description of research methods,construct the anatomy of thick oil layer structure mode.4.on the basis of the theory of various types of research,field test,and found that the remaining oil to water flooding well network encryption and selective perforation of the two methods for the focus of tapping the potential way.