A multi-fractured well performance model for unconventional reservoirs.
A multi-fractured well performance model for unconventional reservoirs.
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DOI：
10.1016/j.heliyon.2022.e10827
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发表时间：
2022-10
期刊：
影响因子：
4
通讯作者：
Nyamekye, Warden Ivan
中科院分区：
文献类型：
--
作者：
Mohammed, Shaibu;Boakye-Ansah, Yaw Akyampon;Gyamfi-Yeboah, Ebenezer;Duartey, Kwamena Opoku;Nyamekye, Warden Ivan
关键词：
非常规油气藏由于渗透率特低，在相当长的时间内处于不稳定状态。尽管如此，裂缝干扰可能导致明显的无流动边界。因此，Duong的模型，这是为过渡状态时期开发的，在后期产生不可靠的估计。在本文中，Duong的模型进行了修改，以考虑裂缝干扰和/或未刺激的油藏区域，作为无流动边界所造成的边界效应。具体而言，经验校正函数，假设指数下降，已被用作“修改器”，以扩展的Duong的模型，以边界为主的流动期间。校正函数确保在边界主导流动期间，指数下降行为占主导地位。所提出的速率下降模型包括伽马函数，其在大的时间收敛。研究结果表明，油井产能动态在早期呈幂律衰减，在后期呈指数衰减。结果还表明，虽然传统的Duong的模型在瞬态期间给出了良好的估计，它产生了乐观的估计在边界占主导地位的流动期间。所提出的模型不仅在过渡状态期间，而且在边界主导流期间给出了良好的匹配和估计。所提出的模型的一个主要优点是，它收敛到估计的最终回收率在很大的时间，而不施加任何速率和时间限制。与分析和半分析模型的估计最终回收率得到了很好的协议。此外，结果表明，该模型给出了保守的估计。该模型可用于分析和预测非常规油藏多裂缝井的早期和后期生产动态。一个经验模型，扩展了Duong的模型后期制定。幂律下降是早期的一个特征。指数下降是后期的一个特征。所提出的模型在很大程度上收敛于最终采收率。非常规油藏; Duong模型;扩展Duong模型;最终采收率预测;未来动态预测;边界控制流
Due to the ultra-low permeability of unconventional reservoirs, transient state prevails for a considerable period. Despite this, fracture interference can cause an apparent no-flow boundary. Consequently, the Duong's model, which was developed for transient-state period, yields unreliable estimates during the late-time period. In this paper, the Duong's model is modified to account for boundary effects caused by fracture interference and/or unstimulated reservoir regions that serve as no-flow boundaries. Specifically, an empirical correction function, which assumes an exponential decline, has been used as a “modifier” to extend the Duong's model to boundary-dominated flow period. The correction function ensures that during boundary-dominated flow period, an exponential-decline behaviour dominates. The proposed rate-decline model encompasses a gamma function, which converges at large times. Results show that a fractured-well production behaviour is characterised by a decaying power-law during early-time period and tends to exponential decline during late-time period. The results also suggest that although the conventional Duong's model gives good estimates during the transient-state period, it yields optimistic estimates during the boundary-dominated flow period. The proposed model gives a good match and estimates not only in the transient-state period, but also in the boundary-dominated flow period. A major advantage of the proposed model is that it converges to estimated ultimate recovery at large times without imposing any rate and time limits. A good agreement of the estimated ultimate recovery with analytical and semi-analytical models was obtained. Also, results suggest that the proposed model gives conservative estimates. The proposed model will be useful for analysing and predicting both the early- and late-time production performance of a multi-fractured well producing from an unconventional reservoir. An empirical model that extends the Duong's model to late-time period is formulated. A power-law decline is a characteristic of early-time period. An exponential decline is a characteristic of late-time period. The proposed model converges to the ultimate recovery at large times. Unconventional reservoirs; Duong's model; Extended Duong's model; Estimated ultimate recovery; Future performance prediction; Boundary-dominated flow
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影响因子：
2.1
作者：
Ansah, J;Knowles, RS;Blasingame, TA
通讯作者：
Blasingame, TA
DOI：
10.1073/pnas.1313380110
发表时间：
2013-12-03
影响因子：
11.1
作者：
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通讯作者：
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影响因子：
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作者：
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通讯作者：
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DOI：
10.2118/12917-pa
发表时间：
1985-01-01
期刊：
SOCIETY OF PETROLEUM ENGINEERS JOURNAL
影响因子：
--
作者：
CARTER, RD
通讯作者：
CARTER, RD
影响因子：
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作者：
Mohammed, Shaibu;Anumah, Prosper;Acheaw, Emmanuel
通讯作者：
Acheaw, Emmanuel