Researeh Of Stratigraphic Correlation And Sedimentary Facies Of Heidimiao Oil Field In Qian’an-Liangjing

Due to Changling Sag predecessors for Heidimiao accunulation systematic research work that it clear Heidimiao oil source for Nenjiang source rocks, Qian’an-two wells nose structure with concave Heidimiao times.The use of 266 development wells prepared Heidimiao sedimentary facies diagram of establishing a northern source by HⅡ3grouping to HⅠ6 sand of depositional patterns gradually from north to south into the product.The summary of the structure, fracture, deposit control in oil and gas reservoirs, and the Changling Sag Heidimiao divided into three lithologic reservoir exploration area, namely the north along the structural- lithological reservoir zone, the middle two dry wells Ann reservoir lithology fault zone and southern Daqingzijing- Heidimiao lithologic reservoir zone which reveals the potential of 250 million tons of resources. Heidimiao has served as chief exploration strata that do not get enough of exploration and development.So Heidimiao of Qian’an – Liangjing well as the research focus, at the conclusion on the basis of previous experience, information and exploration resulted before people recognize the clue again, through the formation of fine isochronous contrast, sedimentary microfacies analysis, sand Fine portray other means, regional sedimentary microfacies analysis, which is preferable favorable target area, and made the following understanding:(1) The establishment of a Heidimiao oil stratigraphic sequence stratigraphic framework, Qian’an- Liangjing wells Heidimiao area is divided into three medium-term, five short-term, and based on sequence stratigraphy, identify Qian’an-two Wells area Heidimiao deposition water datum change reflected back into the three evolutionary sequence retreat.(2) A comprehensive analysis of lithology by coring wells, sedimentary structures, configurations, paleontology, and other electrical characteristics, the establishment of micro-phase standard histogram, clear Heidimiao sedimentary facies and microfacies characteristics, mainly developed water Under the distributary channel, mouth bar, sheet sand, stacked sheet sand, former delta.(3) By observing and analyzing the core, dense well dissected, build sand body identification standards for the region’s fine sand portray. All sand is generally 8-10 layer, wherein the backbone of sand layer 4-5, the cumulative thickness of more than 10 m, superimposed contiguous spread.(4) By provenance, single well-phase, phase profile, plane, from the point to the face of the region Heidimiao depositional environment and depositional facies careful analysis, that the Black Lands temple delta front sands oil to Lake extends far greater control is affected by river erosion rate is much smaller than the wave speed sand accumulation.