| Changchunling area is a important evaluation deployment area in Jilin oil field duringthe12th Five-Year Plan.Currently, Little research around micro-characteristics of Fuyu oillayers in Changchunling area has been carried out, restricting its further exploration anddevelopment. With the guidance of multidisciplinary theories such as petroleum geology,reservoir geology,petroleum development geology and petrophysics, and based on thedescription of cores and a large amount of data of conventional and casting thin section, SEM,X-ray analysis of clay minerals, cathodoluminescence, electron microprobe,granularityanalysis, pattern analysis of pore structure and high-pressure Hg injection, this paperprovides a systematic and in-depth analysis and research of reservoirmicrocharacteristics including petrological chacharacteristics, diagenisis, pore evolution, porestructure, microheterogeneity, physical properties, of Fuyu oil layers.The study shows that, Fuyu reservoir rock type is mainly lithic arkose, followed byfeldspathic litharenite, miscellaneous content in the9.10%-13.82%, size is fine, finesandstone takes absolutely advantage, make up nearly50%times, siltstone, degree of sortingin the medium, structure of high maturity. Fillings are mainly muddy mixed matrix, siliceousand carbonate cements. A rock stage the main reservoirs rock stage at the late diagenetic stageA1-A2. The types of pore are mainly intergranular pore, secondary pore, composite hole, thethroat type is flaky, curved sheet and tube bundle shape throat. Pore throat combination typebelongs to the hole and a small hole, fine throat and small throat type reservoir permeabilitypore throat control obviously, porous throat volume increasing, the lower the permeability of.In comprehensive consideration of reservoir physical properties and its correlates betterpore structure parameters, combined with its petrologic characteristics, reservoir microfaciescharacteristics, by using cluster analysis method, the study area Fuyu oil reservoirs aredivided into three categories. The study for guiding research area next step efficient,reasonable development provides the basis for the Fuyu reservoir. At the same time, for thesouthern Songliao Basin Fuyu reservoir exploration and development as well as the furtherresearch is of great reference value. |
