储层地质建模研究可以明晰油气资源的聚集规律，为油气资源的勘探开发提供科学参考。东营凹陷牛庄油田河125-122区块，具有一定的生油能力，存在地质沉积环境认识不清、储层物性差、砂体厚度薄、分布零散不均匀等问题，导致现今区块内新钻井的开采效果仍然不佳，钻遇的砂体较少。而对于该区块内已经投入生产的地区，由于油气资源开采年限逐渐增长，也需要进一步厘清地质情况，才能有针对性的解决当前油气资源开采过程所遇到的问题，提高采收率。

为了进一步认识区块的地质情况，提升勘探开发的效果，本文利用测井、地震和分析化验等诸多地质资料，先对全区的地层进行了重新的划分，完成地层格架的建立。在此基础上展开对该区沉积相特征和储层综合评价的分析，进而完成该区关于油气资源的精细地质模型的建立。研究的主要结论如下：

（1）研究区沙三中亚段被划分为30个小层，各小层的平均地层厚度约为13.5m。河125块地层倾角较平缓、变化较小，主要受三级断裂控制。河122块地层倾角相对较大，为4～12°，主要受两条北倾区域断裂控制。

（2）区块内79口井的测井曲线形态可分为箱型、齿型以及漏斗型，分别对应滑塌沉积和碎屑流沉积。碎屑流沉积岩性多为粉细砂岩，砂体多表现为块状，岩心观察多发现异粒岩体，并存在较多的泥砾和泥岩撕裂屑等特征，该沉积可以往下再细划分成砂质、泥质两种碎屑流。滑塌沉积多灰质泥岩同较厚的块状深灰色泥岩的互层，存在深灰色、灰褐色油页岩或油泥岩，利用岩心资料可以观察到较多的滑塌构造和块状层理。区块砂体的发育和分布极不均匀，多呈现透镜体形状，在各个层位间的分布不稳定，厚度普遍较薄。

（3）通过建立地质模型，发现物性模型同储层综合评价的结果具有良好的一致性，本区井间渗透率差异较大，平面非均质程度较强，油藏为典型的中～低孔、低渗储层。通过地质模型储量复算和渗透率与孔隙度的抽稀检验，发现模型具有较好的可靠性。综合比较发现Es₃z4砂组最具开采价值，该层段砂体的厚度较大，发育程度较高，呈现一定的规模。

本次对牛庄油田河125-122 区块沙三中亚段精细地质模型的研究工作，为区块内空白区域的勘探方向提供理论指导，为该区后续的油气勘探和开发提供新思路，对相似地质条件下的油气资源评价具有一定的指导意义。

The study of reservoir geological modeling can clarify the accumulation patterns of oil and gas resources, providing scientific references for the exploration and development of oil and gas resources. The He125-122 block of Niuzhuang Oilfield in Dongying Depression has a certain oil generation capacity, and there are problems such as unclear understanding of geological sedimentary environment, poor reservoir physical properties, thin sand body thickness, and scattered and uneven distribution. As a result, the mining effect of new drilling in the block is still poor, and there are few sand bodies encountered during drilling. For the areas that have been put into production in this block, due to the gradual increase of oil and gas resources exploitation years, it is also necessary to further clarify the underground geological conditions in order to solve the problems encountered in the current oil and gas resources exploitation process and improve oil recovery.

In order to further understand the geological situation of the block and improve the effect of exploration and development, this paper redivides the strata of the whole area on the basis of many geological data, including well logging, seismic and analysis, and completes the establishment of the stratigraphic framework. On this basis, the characteristics of sedimentary facies and comprehensive evaluation of reservoir in this area are analyzed, and then the fine geological model of oil and gas resources in this area is established. The main conclusions of the study are as follows:

(1) The Shasan Middle Subsegment in the research area can be divided into a total of 30 sub layers, with an average stratigraphic thickness of approximately 13.5m for each sub layer. The dip angle of the strata in Block 125 of the River is relatively gentle and has little variation, mainly controlled by tertiary faults. The dip angle of the He122 block is relatively large, ranging from 4 to 12 °, mainly controlled by two northward dipping regional faults.

(2) Through the study of core and electric logging curves, the logging curves of 79 wells in this area are roughly divided into three types: box type, tooth type and funnel type, corresponding to slump deposition and clastic flow deposition respectively. Clastic flow sedimentary lithology is mostly silty fine sandstone, sand body is mostly massive, heterogranular rock mass is found in core observation, and there are more mudstone and mudstone tearing debris and other characteristics, the deposit can be further subdivided into sandy and muddy clastic flow. There are dark gray and grayish brown oil shale or oil mudstone in the interbedding of slump sedimentary gray mudstone and thick massive dark gray mudstone. More slump structures and massive bedding can be observed by using core data. The development and distribution of sand bodies in the block are extremely uneven, and most of them show the shape of lens, the distribution among various layers is also unstable, and the thickness of sand bodies is generally thin.

(3) By establishing a geological model, it was found that the physical property model has good consistency with the comprehensive evaluation results of the reservoir. The permeability difference between wells in this area is significant, and the degree of plane heterogeneity is strong. The oil reservoir is a typical medium to low porosity and low permeability reservoir. Through recalculation of geological model reserves and thinning tests of permeability and porosity, it was found that the model has good reliability. Through comprehensive comparison, it was found that the Es₃z4 sand group has the most mining value, and the thickness of the sand body in this layer is relatively large, with a high degree of development and a certain scale.

The research work on the fine geological model of the Shasan Middle Sub section in the He 125 122 block of Niuzhuang Oilfield provides theoretical guidance for the exploration direction of the blank area within the block, provides new ideas for subsequent oil and gas exploration and development in the area, and has certain guiding significance for the evaluation of oil and gas resources under similar geological conditions.