The Research On Fracture Prediction Of Metamorphic Buried-hills In Well Area Sheng601-Shen630,Liaohe Oilfield

Archean buried-hills in well area of Sheng 601- Shen630, Damintun depression, is the main exploration to increase reserves and production capacity to replace the block in Liaohe Oilfield Shenyang Oil Production Plant, due to the metamorphic buried hill has strong heterogeneity, for a lack of effective means to describe the cracks finely, that is the main factor to restrict the buried hill belt efficient exploration and development, In order to realize the cracks describe has three emergency problem to solve:the first problem:lithology identification and distribution of a clear understanding, and resulting in the advantages of rock fracture zone is difficult to determine; the second problem:some of the well log interpretation conclusion and formation and production test are mismatch, logging fracture identification standards are not uniform; the third problem:in view of the metamorphic buried hills and the well-combined with the techniques of fracture prediction system is not formed. In view of this, in this article in allusion to Sheng601-Shen630 buried hill facing the problems in exploration and development, starting from single well logging fracture evaluation and lithology identification, confirming single well crack distribution characteristics, on the basis of this adopt the idea "well log and seismic data, dynamic and still load coupling, the known to the unknown" to carry out fine cracks in the spatial distribution characteristics described. Focus on the three studies:the first is to develop the reservoir lithology identification and evaluation research, establish regional well logging data lithologic identification standards, for regional lithology identification, and determine the advantages lithology development zone; the second is to carry out the logging fracture identification and evaluation research, make full use of conventional logging and imaging logging data in fracture identification, establish a buried hill reservoir of conventional and imaging logging qualitative and quantitative identification standards, lay a foundation for the next step of crack prediction research; the third is a variety of technology joint application, to carry out the target area reservoir fracture distribution characteristics, the important is through nonlinear neural network?analysis of ants and other joint application of the technology, many means to predict the crack distribution regularities of Sheng601-Shen630 well area, solve the defects and limitations of a single method to predict, improve the research precision. Through this research formed series of exploration and development technology of "logging evaluation technology?cracks geological modeling technology?post-stack seismic processing technology and cracks fine description technology" joint for fractured reservoir, describe the cracks in the spatial distribution characteristics of the study area, propose the new standards in view of the fractured reservoir classification and regionalization assessment, determine the concentration of fracture development zone. Among that, I type fracture development zone is mainly distributed in Shen630 well area of south-central to Dongshengpu buried hills which is a circular distribution zone; II type fracture development zone is mainly distributed in the relatively low place in the east of Shen630 well area, which is a smaller scale, on the north side of the Sheng601 well area is given priority to with ?,? fracture development zone. The methods formed in the process of research has the very good reference value to other metamorphic buried hill reservoir exploration and development work.