Research On The Reservoior Characteristics In Jie Faulted Block2 Of Linnan Oil Field

Guided by reservoir geology and sedimentology, this paper conducted a study ongeological characteristics of the reservoir of 5 sand set in upper Es 3 Segment in LinnanOilfield by using drilling, logging, testing, and various data analysis comprehensively. Thispaper carried out a study on the reservoir heterogeneity and diagenesis systematically, andanalysed factors affecting reservoir properties and also evaluated reservoir classification,thus providing basis for further understanding of reservoir distribution and reservecalculation.Heterogeneity of laminated layers was characterized by the permeability model, layerpermeability and mezzanine level of development. Work area developmental rhythm,counter-rhythm, complex rhythm and uniform rhythm, with complex rhythm as the main.Identified muddy interbeds, calcareous interbeds and physical layer whoes heterogeneity isstronge. Clay interlayer is the main layer of compartment and heterogeneity is strongebetween layers. In the plane, sand, mainly irregular banded, was distributed wildly and thin.Followed by potato-like, which is formed at underwater rivers and river dam because ofdeposits, sand is thick, and porosity and permeability of planar have a strongnon-homogeneous.This paper studied micro-heterogeneity of the reservoir from the rock characteristics,diagenesis and pore structure characteristics. The maturity of sandstone is low and thematurity of fabric is high. (Sandstone has low mature mineralogy, and high maturity fabric.)There is mainly medium grain lithic sandstone in Street 203 well and there is mainly lithicquartz sandstone in Street 204 well. Secondary porosity of reservoir developed, including abig pore coarse throat and medium pore medium throat, fine throat and micro-fine throatfour structural classes. Reservoir properties in this area are controlled by sedimentarymicrofacies and diagenesis. Diagenesis research shows that the reservoir is late diagenesis A-B, whose main functions are compaction, pressure solution, cementation, replacementand dissolution. Compaction leads to the loss of the original intergranular pores, and thedecrease of porosity. An increase in the cement content of reservoir can result in thereduction of porosity. Dissolution of the reservoir has played a constructive role inimproving performance of the reservoir. Solution of explain things makes particlesdissolved indirectly and informed dissolution porosity of intragranular and intergranular.Diagenetic makes an enhancement of reservoir heterogeneity.On the basis of the above, the mercury reservoir was divided into four types accordingto the parameters of reservoir properties and characteristic parameters. In this paper, theobjects of study are the following in turn: Classâ…¡reservoir, and Classâ… ,â…¢,â…£reservoir.