Study Of Reservoir Characteristics Of The Middle Section Of The Third Strata Of Shahejie Formation Of Haojia Oilfield In Dongying Depression

With the raising of degree of oilfield exploration and development，Oil and gasexploration direction is also changing. From the past looking for a simple structural reservoirtransformed into now looking for more complex Subtle Reservoir. In recent years, a complexhidden sand and lithologic reservoir has become the important position for increase in oilreserve and production in ES3of Shengli oilfield. In this paper, take the middle section of thethird strata of Shahejie Formation of Haojia Oilfield in Dongying sag as the research object.In sequence stratigraphy, reservoir geology and sedimentology of theoretical guidance. Use ofwell logging, seismic, production data and combining profile correlation method as systemresearch in high resolution sequence stratigraphy, sedimentary characteristics and reservoircharacteristics of the study area(middle section of ES3).The results showed that: Dongying sag of ES3is divided into3sets of fourth levelsequence, including the upper sequence, the middle sequence and the lower sequence. Themiddle sequence is classified into six sets of fifth order sequences, the roof and floor ofmiddle section of Es3corresponding to reflecting standard layer T6, T4on seismic sections,The middle section of Es3objective interval progradation characteristics is not obvious Wavegroup is parallel relationship.Research the depositional system and sedimentary environment in the study area. Byusing rock ore materials and sandstone percentage and sand ratio characteristics to analysisprovenance of6Sand group in the study area. Think ES3in Haojia oilfield accept sand fromthe eastern of Dongying delta to the southeastern of NiuZhuang delta source supply. Formsoutheast provenance and the west and northwest into product system. Sand group from eastto west on transverse phase sequence alternation of delta front mouth bar facies, deltafluxoturbidite facies, sheet sand, Under the background of formation of lacustrine delta,turbidite sand body sedimentary system.Analysis of reservoir characteristics in the study area, According to the characters ofgrain size analysis, physical property, mercury intrusion, the microscopic observation,scanning electron microscopy (sem) analysis and well logging data digital processing results,etc. Rocks in the study area main content is debris feldspar fine-sandstone. Detritalcomposition are mainly quartz, feldspar and cuttings, interstitial material composition areCarbonate Argillaceous and secondary quartz. Structure characteristics of rocks: Particles aremore angular, low psephicity, grind degree of difference of separation medium, the pore- contact cementation types. Low maturity structure. Through to the diagenesis in this area,physical properties and pore structure characteristics study, Delta sand body reservoirproperty is mainly affected by sedimentary facies, cementation, and diagenesis.Though studythe degree of Permeability, hierarehieal factor and distributed of the interbed. We have theconclusion that the aeolotropism in the area are serious. Pointed out that the region offavorable reservoir. To guide the sand and lithologic reservoir effective exploration anddevelopment.