Jujube North Area In Dagang Oilfield Research Of Sedimentary Facies

The area is the area north of Zaoyuan oilfield, area12km2, relates to drilling more than150comprehensive utilization of seismic and logging data, combined with the former land theupper sequence division, the geology theory and sequence stratigraphy, geophysicaltechnology closely, the study area jujube region north of deposition feature undertook thesystem studies. Geological characteristics of the current complex in Zaoyuan oilfield,Structure is located in the central part of Huanghua depression in Kongdian faults in theQianshan tectonic belt south, South Fenghuadian structure, west of Cangdong sag, East andadjacent hole East, North and South connected Zilaitun structure, and Shen Jia Pu structures.From the north to the south by the Zilaitun, weathering shop, shenjiapu three oil-bearingstructure. The main fault in the West will be the hole structure is divided into South and Northjujube jujube two fault block,development difficulty is great. In the high resolution sequencestratigraphy theory as the instruction, using the well seismic data to determine high-levelstratigraphic framework, sedimentary cycle division with sand group, with sedimentaryrhythm division layer, in the cycle is not obvious in the layer above, using the thicknessvariation of auxiliary division layer group boundaries, in thick sand body split focus onsequence, and pay attention to the use of curve of natural potential, natural gamma curve andresistivity curve more obvious signs, jujube jujubeⅣ reservoir north area was divided into1long term base level cycles,7middle-term base-level cycles,21short-term base-level cycles,roughly corresponding to7sand group and21small layer, Stratigraphic division andcorrelation of the oilfield fine geologic research foundation and the most important key, thepartition size determines the underground reservoir of vertical degree, its reliability directlydetermines the deposition, reservoir and structural geology study is correct or not, therefore,fine division and correlation of sequence stratigraphy analysis one of the important basicresearch work of the project. Only the establishment of stratigraphic framework is reasonable,grasp the tectonic feature, can reflect the reservoir distribution rules, improve the accuracy ofreservoir prediction and evaluation. Therefore, the study on comprehensive application ofcore, logging, seismic, dynamic development data, to study the area of layers stratigraphicdivision and contrast, build fine isochronous stratigraphic framework, and through wellseismic combined with the establishment of the tectonic framework, and laid a solidfoundation for reservoir prediction and evaluation.effective to reduce the complex fault blockreservoir study of multiple solutions, to maximize the dynamic, static data unification ofZaoyuan oilfield, the next step in the development of deploy to provide reference.