CAJ | 학술논문

位于塔里木盆地DX油田的东河砂岩段储层是重要的海相碎屑岩储层，为确定研究区东河砂岩段储层物性下限和预测有利区，根据DX油田东河砂岩段的岩心、测井、试油等资料，对储层的岩性、物性、含油性和电性特征以及其相互关系开展研究。储层特征研究结果显示，DX油田东河砂岩段储层以岩屑石英砂岩为主，在测井曲线上表现为自然伽马和自然电位呈微锯齿状箱型，电阻率呈台阶状；平均孔隙度14．52％，平均渗透率282．3×10－3μm2，含油级别以含油和油浸为主，储层物性较好，含油级别较高。储层四性关系研究结果显示，岩性粒度越大，泥质含量越低，储层物性越好，含油级别越高，测井响应值显示为较低的密度值和较高的声波时差、中子值，储层的岩性、物性、含油性与电性之间具有较好的一致性。运用多种方法确定储层孔隙度下限为8％，渗透率下限为5×10－3μm2，储层平面分布显示研究区西北部DX7井区为有利区带。
위우탑리목분지DX유전적동하사암단저층시중요적해상쇄설암저층，위학정연구구동하사암단저층물성하한화예측유리구，근거DX유전동하사암단적암심、측정、시유등자료，대저층적암성、물성、함유성화전성특정이급기상호관계개전연구。저층특정연구결과현시，DX유전동하사암단저층이암설석영사암위주，재측정곡선상표현위자연가마화자연전위정미거치상상형，전조솔정태계상；평균공극도14．52％，평균삼투솔282．3×10－3μm2，함유급별이함유화유침위주，저층물성교호，함유급별교고。저층사성관계연구결과현시，암성립도월대，니질함량월저，저층물성월호，함유급별월고，측정향응치현시위교저적밀도치화교고적성파시차、중자치，저층적암성、물성、함유성여전성지간구유교호적일치성。운용다충방법학정저층공극도하한위8％，삼투솔하한위5×10－3μm2，저층평면분포현시연구구서북부DX7정구위유리구대。
The Donghe Sandstone Reservoirs in DX oil field are the typical marine clastic reservoirs and play an important role in Tarim Ba -sin .To determine petrophysical parameter cutoff and predict the favorable exploration zone ,a study on Donghe sandstone reservoirs is car-ried out ,which is based on the data of cores ,logging and oil tests from DX oil field ,mainly focuses on characteristics and relationship of li-thology ,physical property ,electrical property and hydrocarbon showings .The results of study on reservoir characteristics show that the main sandstone in the area is rock debris quartz sandstone ;the appearance of natural gamma and natural potential of the reservoirs seems like mi-cro saw tooth type box ;the resistivity curve has a step ;the average porosity is 14 .52% ;the average permeability is 282 .3 × 10-3μm2 , while the oil level of most cores is oil-bearing or oil -soaked ,showing that the reservoir is very good .The results of study on relationships of four characteristics of the reservoirs show that the strata with larger particle size and less mud content tend to have better physical property and higher oil level ,which respond as lower density ,larger interval transit time and neutron value in the log curves ,and the study shows the good consistency of the lithology ,physical property ,electrical property and hydrocarbon showings .Based on a variety of methods ,the porosity lower limit value is identified as 8% ,and permeability lower limit value is 5 × 10-3μm2 .The reservoir plane distribution shows that the DX7 well zone in northwest of the study area is the favorable zone .