Analysis of Production Data From Hydraulically Fractured Horizontal Wells in Shale Reservoirs

Abstract

This paper discusses the analysis of production data from hydraulically fractured horizontal wells in shale reservoirs. The stimulated volume around the well is simulated by a naturally fractured region. A semianalytical model incorporating the key features of reservoir heterogeneity and the details of hydraulic fracture and wellbore flow is used to present production-decline characteristics in terms of transient-productivity index. Production-decline analysis of fractured horizontal wells in shale-oil and shale-gas formations by transient-productivity index is explained and demonstrated by field applications.

Material-balance analysis of gas and gas-condensate reservoirs with diverse drive mechanisms

“…Subsequently, Fig. 19 verified this p av trend with independent analyses involving transient PI (Medeiros et al, 2010) and combined static-and dynamic-MB methods (Ismadi et al, 2012). Furthermore, a combination of pressure buildup, flow-after-flow, and transient-IPR tests shown in pink triangles validated this pressure trend.…”

Shut-in based production optimization of shale-gas systems

“…Simplified systems modeling of shale-gas wells porosity systems model the fracture and rock matrix-blocks as two distinct media with different properties. The main difference between the numerous variants of dual-porosity models that have been developed, lies in modeling of the flow between the two media, and the imposed geometry of fractures and shale matrix blocks (Carlson and Mercer, 1991;El-Banbi, 1998;Medeiros et al, 2010;Ozkan et al, 2011). Even though these models intuitively fit the matrix-fracture system of shalegas reservoirs, their idealized cube-based geometry and need to set reservoir specific coefficients such as matrix storativity and interporosity flow, often leads to a lack of accuracy in the longterm transient flow behavior in shales .…”

“…Cipolla et al (2010); Medeiros et al (2010), and cylindrical geometry (Economides and Wang, 2010;Larsen and Hegre, 1994;. The two most commonly applied matrix-fracture geometries are the so-called slab model, illustrated in Fig.…”

Multi-continuum Approach to Modelling Shale Gas Extraction

“…Lee and Slide (2010) and Ilk et al (2008), and new models have been proposed to avoid these physically unreasonable results, for instance, by considering a transient productivity index, e.g. Araya and Ozkan (2002), Mattar et al (2008) and Medeiros et al (2010).…”