Daqing Oilfield is rich in low permeability reservoirs. In order to fully understand the development dynamics of ultra-low reservoirs, this paper takes as an example and studies productivity fractured horizontal Wells by numerical simulation method. The results show that decreases exponentially with decrease formation permeability. well increases fracture length spacing. With increase coefficie...

Abstract This paper presents a well test interpretation methodology using characteristic points and lines found on the pressure derivative versus time log–log plot for characterization of finite-conductivity fractured vertical hydrocarbon in double-porosity (heterogeneous) formation considering new practical analytical Laplacian model which require less computational have more accuracy than sem...

The present photocase illustrates the possible mechanism of direct cardiac injuries from broken sharp jagged fractured ends of ribs in blunt force trauma to the chest in run over traffic mishaps. We propose that the projecting fractured ends of the ribs penetrate the underlying thoracic organs due to the transient phenomenon of deformation of chest cavity under pressure in run over traffic mish...

[1] One potential consequence of global climate change and rapid changes in land use is an increased risk of flooding. Proper understanding of floodwater infiltration thus becomes a crucial component of our preparedness to meet the environmental challenges of projected climate change. In this paper, we present the results of a long-term infiltration experiment performed on fractured ash flow tu...

We report a case of a 42-year-old female who was referred to our department for the management of a fractured dental needle following administration of an inferior alveolar nerve block. The fractured needle was successfully removed under general anaesthesia. We also suggest some guidelines for preventing this unfortunate event.

Dose the fractured guide wire should be removed during or after percutaneous coronary interventions? In case when the patients have unstable hemodynamic status the fractured guide wire should be removed with percutaneous or surgical method. Antiplatelet drug administration should be considered after procedure to prevention of the coronary artery thrombosis.

BACKGROUND Monsegmental pedicle instrumentation (MSPI) has been used to treat thoracolumbar fractures. However, there are few reports about the biomechanical characteristics of MSPI compared with traditional short-segment pedicle instrumentation (SSPI) in management of unstable thoracolumbar fractures, and the influence of vertebral fracture on screw stability is still unclear. METHODS This s...

Because the continuum approach is relatively simple and straightforward to implement, it has been commonly used in modeling flow and transport in unsaturated fractured rock. However, the usefulness of this approach can be questioned in terms of its adequacy for representing fingering flow and transport in unsaturated fractured rock. The continuum approach thus needs to be evaluated carefully by...

In this paper we evaluate quantitatively the hypothesis that topographic modification of floor-fractured craters on the moon was accomplished predominantly by viscous relaxation. Adopting the simple assumption that the moon may be modeled as having a uniform Newtonian viscosity, we compare the observed topographic profiles for a number of floor-fractured craters with the profiles predicted from...