胡尖山油田H307-X46区侏罗系油藏动态评价

发布时间：2018-06-11 17:27

本文选题：H307—X46区 + 延9　；参考：《西北大学》2015年硕士论文

【摘要】：本文以精细油藏描述理论为指导,在对储层特征充分认识的基础上,结合油藏动态特征和储层特征,针对低渗透非均质岩性油藏,深化对胡尖山油田H307—-X46区侏罗系延9、延10油藏的动态特征认识,细致研究油藏各生产参数、油水运动规律,进行动态评价,对于油藏开发中产生的问题进行深入剖析,找出控制因素,提出调整对策,帮助油藏持续高效开发,实现稳油控水。研究中取得的主要认识和建议如下：(1)研究区构造上整体呈现东高西低的西倾单斜构造局面,局部发育近东—西方向的小型鼻隆及构造低值区；延9为辫状河三角洲平原亚相,延10为辫状河亚相；油藏类型为弹性溶解气驱的构造—岩性油气藏,虽然全区底水较发育,但是水油体积比仅为6.62,属于底水不活跃型,需要在开采过程中注水以及时补充地层能量。(2)在已知目前各区块的井网密度和流体粘度性质情况下,以各区块储层有效厚度、有效渗透率为重要地质参数,采取油藏工程计算方法得出研究区中各区块合理采油速度分别为：H307区块2.08%、A62区2.10%、X46区2.09%,进而得出各区合理采液强度分别为：H307区1.13m3/(m·d)、A62区1.14m3/(m·d)、X46区0.83m3/(m·d),对照该合理值,认为目前H307区和X46区采液强度要适当降低。(3)以合理采液强度为基准,三个区块合理的注水强度分别为A62区3.43m3/ (m·d)、H307区3.39m3/(m·d),X46区2.5m3/(m·d)。结合油藏目前压力保持水平,A62区需要对应减少注水,H307区则需要稍微增加注水,X46区压力保持水平较好,调整时应将采液强度与注水强度同时调整。(4)影响油井单井产能的主要因素有储层物性和构造特征两点,表现为：储层物性越好产能越高,高产区多位于构造高值带上,另外,增产措施的实施也是不可忽略的一个重要因素；底水发育情况、储层非均质特征等因素,虽对单井产能也有一定影响,但不是主要因素。(5)研究区见效特征可分为四大类,分别是见效稳定型、见效上升型、见效即见水型和措施见效型,注水见效井以见效上升型为主,占到87.4%。经分析,控制油井见效的主要地质因素有：沉积相和砂体展布及其砂体连通状况、储层物性和非均质性。H307区和X46区与A62区相比,前者砂体虽然厚度较小,但连通状况较好,平均渗透率比后者高出3-4×10-3μm2,渗透率非均质性也较后者弱,夹层也不甚发育,H307区和X46区与A62区见效比例相比,也高出10个百分点。(6)研究区见效时间长短主要受控于储层物性和注采井距影响。H307区和X46区主要开采层位为延92和延93,其渗透率平均值分别为13.38×10-3μm2和14.58×10-3μm2,物性较好,见效期也较快,平均仅有3个多月；而A62区主要开采层位为延101,其平均渗透率则只有10.71×10-3μm2,该区块见效时间也较长,平均在6个月以上；H307区和X46区井距为433m,A62区井距为520m,井距越长,见效时间也越长。(7)经分析,可将区内剩余油主要分为三种类型,第一种受沉积控制；第二种受非均质性控制；第三种则是井网未控制到的油层。建议：为解决注采井间矛盾、维持油藏稳产、挖潜剩余油,需要对注采井组间射孔不对应井进行补孔,底水高含水井降低采液强度或者对底水进行封堵,长期注水不见效及见效后快速见水井组实施双向调剖。
[Abstract]:Guided by fine reservoir description theory, on the basis of fully understanding of reservoir characteristics, combining reservoir dynamic characteristics and reservoir characteristics, the dynamic characteristics of Jurassic Yan 9 and Yan 10 reservoir in H307 - -X46 area of Hu Jianshan oilfield are deepened, and the production parameters of oil reservoirs and oil and water movement rules are carefully studied. The main understanding and suggestions made in the study are as follows: (1) in the study area, the whole body presents the West tilting monocline structure situation in the East High West low, and the local development. The small nasal uplift and low value zone in the near east to the West; the extension 9 is the braided river delta plain subfacies, and the extension 10 is the braided river subfacies; the reservoir type is the structural lithologic reservoir with elastic dissolving gas drive. Although the bottom water is more developed in the whole region, the water and oil volume ratio is only 6.62 and the bottom water is inactive. In time, the formation energy is supplemented. (2) under the condition of well network density and fluid viscosity of each block, the effective permeability is an important geological parameter with the effective thickness and effective permeability of each block. The reservoir engineering calculation method is adopted to distinguish the reasonable oil recovery speed of each block in the study area: H307 block 2.08%, A62 area 2.10%, and X46 area 2.09%, and then, It is concluded that the rational extraction strength of each area is H307 region 1.13m3/ (M / D), A62 region 1.14m3/ (M / D) and X46 region 0.83m3/ (M D). Zone 2.5m3/ (M. D). Combined with the current reservoir pressure maintenance level, A62 region needs to reduce water injection, H307 area needs a little increase of water injection, X46 zone pressure keeping level is better, the adjustment should adjust the strength and water injection intensity at the same time. (4) the main factors affecting the productivity of single well have two points of reservoir physical property and structural characteristics. The higher the productivity is, the higher the productivity is, the high yield area is located on the structure high value zone. In addition, the implementation of the increasing production measures is also an important factor that can not be ignored. The development of the bottom water and the heterogeneity of the reservoir have some influence on the productivity of the single well, but it is not the main factor. (5) the effective characteristics of the study area can be divided into four major categories, which are to see respectively The main geological factors for controlling the efficiency of the oil well are the distribution of the sedimentary and sand bodies and the connectedness of the sand bodies, and the reservoir physical and non homogeneous.H307 region and the X46 area are compared with the A62 region, the former sand body, although the sand body is the former, though the effect is stable and effective. But the thickness is smaller, but the connection condition is better, the average permeability is 3-4 * 10-3 Mu M2 higher than the latter, the permeability heterogeneity is less than the latter, and the interlayer is not well developed. The H307 and X46 areas are also 10 percentage points higher than the A62 region. (6) the effect time of the study area is mainly controlled by the reservoir physical property and the injection production well distance affecting.H307 zone and X The main mining strata in the 46 area are extension 92 and extension 93, with the average permeability of 13.38 * 10-3 Mu m2 and 14.58 x 10-3 Mu m2, which have better physical property and more effective time, with an average of only 3 months, while the main mining horizon in A62 area is 101, and the average permeability is 10.71 * 10-3 m2, and the block is also longer, average for more than 6 months; H3 The well spacing in 07 area and X46 area is 433M, A62 well spacing is 520m, the longer the well spacing is, the longer the effective time is. (7) after analysis, the remaining oil in the area can be divided into three types, the first is controlled by deposition, the second is controlled by non homogeneity, and the third is the oil layer uncontrolled by the well network. In order to produce and dig the remaining oil, it is necessary to fill the hole between the injection and production wells, and the high water well in the bottom water can reduce the strength of the mining fluid or block the bottom water. After the long-term water injection is not effective and effective, the water well group can be quickly divided into two direction profile control.
【学位授予单位】：西北大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.13

【参考文献】