Analytical interference testing analysis of multi-segment horizontal well
Analytical interference testing analysis of multi-segment horizontal well
复制标题
多段水平井分析干扰测试分析
DOI：
10.1016/j.petrol.2018.08.019
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发表时间：
2018-12
影响因子：
--
通讯作者：
Shirish Patil
中科院分区：
文献类型：
--
作者：
Youwei He;Shiqing Cheng;Jiazheng Qin;Yang Wang;Meng Li;Haiyang Yu;Zhi Chai;Shirish Patil
大多数水平井干扰试井分析都忽略了水平井的流体流动，用一个点来表示。此外，即使在现场测试期间观察井被认为产生流体，产量分布也被假设为沿着水平井筒是均匀的。实际生产测井试验表明，只有部分水平段是生产的，且沿沿着水平井筒的产量贡献是不均匀的。推导了考虑注入威尔斯井干扰和非均匀开采对MSHW压力响应影响的解析解。水平观测井不需要关井，水平井是由多段任意流量、任意长度、任意表皮等组成的。建立了干扰试井模型的典型曲线，讨论了活动威尔斯井和观测井对压力动态的影响（如，注入速率、井距、水平观测井速率分布、水平生产段的数量和长度、渗透率各向异性、垂直和水平平面中的水平井筒位置）。结果表明，由于周围注水井的影响，在中后期，压力和压力导数曲线下移。由于相邻威尔斯井的干扰，拟径向流态可能消失。当总注入量小于生产量时，干扰流态（IFR）在压力导数曲线上可稳定在0.5*（1-λ qjD）。当注入量远大于产出量时，压力导数曲线表现出与底水驱相似的特征，该模型更符合实际情况，能更好地理解水平观测井开采时注入威尔斯井的干扰情况。利用该模型，可以通过干扰试验评价威尔斯井间的连通性，判断井间的进水方向，优化井网，保证二次采油或提高采收率的顺利进行。
Most interference-testing analysis of horizontal well ignores fluid flow in and out of the horizontal observation well and represent it by a point. Moreover, even if the observation well is considered to produce fluids during the field test, the production distribution is assumed to be uniform along horizontal wellbore. In fact, production logging tests have shown that only partial horizontal segments are productive and the production contribution is non-uniform along horizontal wellbore.The aim of this paper is to develop a novel interference testing model of a multi-segment horizontal well (MSHW). Analytical solutions are derived to incorporate the interference of injection wells and consider the effect of non-uniform production on pressure response of the MSHW. There is no need to shut in the horizontal observation well, and the horizontal well is composed of multiple segments with arbitrary rate, length, skin, etc. The type cures of the interference testing model are developed to discuss the effect of both active wells and observation well on pressure behavior (e.g., injection rates, well spacing, rate distribution of horizontal observation well, number and length of horizontal producing segments, permeability anisotropy, horizontal wellbore location in vertical and horizontal plan). Results indicate that the pressure and pressure derivative curves move down during the middle and late flow regime due to the effect of surrounding injectors. The pseudo-radial flow regime may disappear due to the interference caused by adjacent wells. The interference flow regime (IFR) may stabilize at 0.5*(1-ΣqjD) on pressure derivative curve when the total injection rates are less than the production rates. The pressure-derivative curve shows the similar characteristic with bottom-water drive when injection rates are much higher than the production rates.The proposed model is more realistic and enables us to better understand the interference of injection wells when the horizon observation well is open to produce. With the help of interference tests, this model can be applied to evaluate the communication between wells, diagnose the water-inflow direction, and optimize well pattern, which ensure the success of a secondary or an enhanced recovery process.
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DOI：
10.2118/203-g
发表时间：
1953-06
期刊：
Journal of Petroleum Technology
影响因子：
--
作者：
A. V. Everdingen
通讯作者：
A. V. Everdingen
DOI：
10.2118/18559-pa
发表时间：
1990-08
期刊：
Spe Reservoir Engineering
影响因子：
--
作者：
E. Ozkan;R. Raghavan
通讯作者：
E. Ozkan;R. Raghavan
影响因子：
3.6
作者：
T. Frick;C. Brand;Bernhard Schlager;M. Economides
通讯作者：
T. Frick;C. Brand;Bernhard Schlager;M. Economides
DOI：
10.15530/urtec-2017-2668100
发表时间：
2017-07
期刊：
--
影响因子：
--
作者：
Hewei Tang;Z. Chai;B. Yan;J. Killough
通讯作者：
Hewei Tang;Z. Chai;B. Yan;J. Killough
影响因子：
2.1
作者：
He, Youwei;Cheng, Shiqing;Yu, Haiyang
通讯作者：
Yu, Haiyang