Boundary Element Methods in Solid Mechanics: With by S.L. Crouch, A. M. Starfield

By S.L. Crouch, A. M. Starfield

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Sample text

Experimental results are shown in Figure 2-2. Figure 2-2 shows that (1) With the increase in sand production, permeability increases nonlinearly. 7% average). 3% average). 2% average). (2) The percentage of permeability increase in different core samples varies greatly, possibly related to the initial particle size distribution of rocks. 2 Influence of particle size on formation permeability The purpose of this experiment is to appraise permeability change after producing different ranges of particle size quantitatively.

To produce with limited sand production is to achieve optimal producing strategy between excluding sand production and allowing sand production on the basis of optimizing well production rate and well productivity. In fact, to produce with limited sand production is to exclude sand production s­electively or limitedly. In other word, for sand production prone reservoirs, formation sand of different sizes will migrate with the flowing of heavy oil during p­roduction, so to purposely prevent the migration of certain and bigger size particles on the basis of analysis of movable sand sizes and distribution will build a sand production filter with the accumulation of migrated sand around the wellbore.

2 m/s. Fluid flowing can be sorted into axial flowing and radial flowing, of which axial flowing (along axial of perforated hole) has a greater impact on sand production as it is easy to clean up broken rock particles on rock surface. So, it is suggested that the bigger diameter and high density perforation be used to improve critical p­ressure drawdown without sand production. In 1992, Shell published a few results of large‐scale laboratory experiments about sand production. The researchers used outcrop samples of a true f­ormation in an oilfield as experimental core.

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