The Reasonable Development Mode Of Weak Volatile Oil And Carbonate Reservoir In Shunbei Zone

The weakly volatile carbonate reservoir is a special type of reservoir,which has both the unique fluid properties of volatile reservoir and the complex geological structure unique to carbonate reservoirs.As a kind of oil reservoir with special fluid properties,volatile oil reservoirs have large differences between their components and conventional black oil components.This also determines that there is a big difference between the development of volatile reservoirs and the development of conventional black oil reservoirs.The reservoir space of carbonate reservoirs is dominated by cracks,holes,and caverns.It is a complex type reservoir with strong aeolotropism,Therefore,it is difficult to develop such reservoir.However,given the considerable reserves of oil and gas in carbonate reservoirs,it is still of great significance for the development of such reservoirs.In this paper,Taken the Ordovician middle-lower system and weakly volatile fault-control fracture-cavity carbonate reservoirs in the well block of the Shunbei-1 well area as the research object.Based on the research status of volatile oil and carbonate reservoirs at home and abroad,In order to determine its rational development method,based on the analysis of geological features and development characteristics,Through the use of reservoir numerical simulation techniques,What research to carry out elastic development simulation studies,water flooding development simulation studies,and gas injection development simulation studies,Thus,the rational development method of the study area was determined.This paper has obtained the following main results:(1)Through the analysis of geological data in the study area,we understand the structural structure and reservoir characteristics of the reservoir.Based on the analysis of three-dimensional engraving data,the study area was divided into three large-scale fracture corrosion zone;The study area was divided into three connected bodies according to the interference test and the converted pressure;The characteristics of weakly volatile oil reservoirs in the study area were analyzed by PVT analysis,fluid properties,and temperature and pressure system and other parameters.Using the volumetric method to calculate the reserves of block.Taking into account the actual situation in the study area,different media models were established and the typical single well reserves were calculated using the well test method.(2)By analyzing the production dynamics of the study area,we can understand the historical production status of the study area;By analyzing the production capacity in the pre-production phase,the average well productivity in the study area is determined to be the medium-productivity well level;Through investigating the recovery ratio formula suitable for the study area,determined the recovery ratio for the study area;By analyzing the declining production conditions of each single well,the average monthly decline rate for each single well is obtained.(3)Through literature research and considering the actual situation in the study area,we can explored the suitable development ways for the study area,Using reservoir engineering methods to study the limits of technological policy developed in the study area;We use the numerical model method to respectively set up a comparative development plans,We set up the elastic development program,water flooding development program,and gas injection development program to conduct simulation studies and select a reasonable development method;According to the above research results,we deployed the new wells and completed the deployment of the plan.